Byg et nyhedsbrevssystem med PHP og MySQL

I dag skal vi bygge et nyhedsbrevssystem ved hjælp af PHP med en MySQL-baggrund. Selvstudiet vil dække opbygningen af ​​et system, der giver mulighed for flere nyhedsbrevslister og afsendelse af beskeder til specifikke lister.

Hej gutter, så vi skal bygge et ret komplekst nyhedsbrevssystem, så lad os komme i gang! Du skal bruge to ressourcer til projektet.

• Silkeikonsættet vil blive brugt til at tilføje visuel "flair" til applikationen.
• Swift PHP Mailer vil blive brugt til at sende vores e-mails.

Trin 1:Opret applikationsskelettet

Når jeg starter et projekt, kan jeg godt lide at layoute mapperne, før jeg begynder at kode, så lad os gøre det nu. Først skal du oprette den overordnede projektmappe. Opret derefter en mappe med navnet admin i din projektmappe. Tilføj derefter to mapper med navne media og swift i admin-mappen. Til sidst skal du oprette en mappe med navnet billeder inde i mediebiblioteket. Du kan også placere Swift lib-mappen inde i den swift-mappe, vi oprettede. Du kan også kopiere de seks silkeikoner, vi skal bruge:

• bullet_green.png
• bullet_red.png
• delete.png
• email_go.png
• find.png
• page_edit.png

Jeg vil strukturere resten af ​​selvstudiet om at skabe CRUD:opret, læs, opdater og slet for fire af vores seks modeller. En anden vil blive redigeret af andre handlinger, og den sjette vil vi ikke oprette CRUD-handlingerne.

Lad os nu først oprette vores database, og vores tabeller bliver vi oprettet gradvist senere. Vi skal nu i gang med kodning. Som en bemærkning vil jeg også antage, at vi vil arbejde med filer i vores admin-mappe, medmindre jeg angiver andet, da det meste af koden er i denne mappe.

Trin 2:Applikationskonfiguration

Hver applikation vil have en eller anden type konfigurationsfil, og vi vil oprette vores nu. Gå videre og opret en fil med navnet config.php og tilføj følgende:

# admin/config.php 
	<?php  
	// DB Settings 
	define('DB_SERVER', 'localhost'); 
	define('DB_USER', 'root'); 
	define('DB_PASSWORD', ''); 
	define('DB_NAME', 'nettuts_ns_demo'); 
 
	define('FROM_EMAIL', '[email protected]'); 
	define('FROM_NAME', 'oh yeah email!'); 
 
 
	session_start(); 
	require_once 'classes.php'; 
	$mini = false; 
	$nonav = false; 
	error_reporting(0);

Så den første sektion opsætter vores databasevariabler, så sørg for at redigere den, så den først er din lokale konfiguration. Vores næste forklaring opsætter nogle e-mail-attributter, som vi vil bruge senere. Den sidste sektion starter vores session op, så vi kan få adgang til den, kræver vores classes.php-fil (vi opretter den på blot et sekund), indstiller standardindstillingerne for nogle layoutmuligheder og sætter derefter fejlrapportering til 0 for at stoppe irriterende advarsler . Men hvis du ser ud til at have problemer, så prøv at kommentere denne linje.

Gå nu videre og opret vores classes.php-fil og tilføj:

# admin/classes.php 
	<?php  
	// Authentication 
	function validate_user($username, $pw) { 
	    if (check_username_and_pw($username, $pw)) { 
	        header('Location: index.php'); 
	    } else { 
	        $_SESSION['error'] = "Login error."; 
	        header('Location: login.php'); 
	    } 
	} 
 
	function logged_in() { 
	    if ($_SESSION['authorized'] == true) { 
	        return true; 
	    } else { 
	        return false; 
	    } 
	} 
 
	function login_required() { 
	    if(logged_in()) { 
	        return true; 
	    } else { 
	        header('Location: login.php'); 
	    } 
	} 
	// mysql  
	function query($sql) { 
	  $link = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('There was a problem connecting to the database.'); 
 
	  $stmt = $link->prepare($sql) or die('error'); 
	  $stmt->execute(); 
	  $meta = $stmt->result_metadata(); 
 
	  while ($field = $meta->fetch_field()) { 
	    $parameters[] = &$row[$field->name]; 
	  } 
 
	  $results = array(); 
	  call_user_func_array(array($stmt, 'bind_result'), $parameters); 
 
	  while ($stmt->fetch()) { 
	    foreach($row as $key => $val) { 
	      $x[$key] = $val; 
	    } 
	    $results[] = $x; 
	  } 
 
	  return $results; 
	  $results->close(); 
	  $link->close(); 
	} 
 
	function count_query($query) { 
	  $link = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('There was a problem connecting to the database.'); 
	  if($stmt = $link->prepare($query)) { 
	    $stmt->execute(); 
	    $stmt->bind_result($result); 
	    $stmt->fetch(); 
	    return $result; 
	    $stmt->close(); 
	  } 
	  $link->close(); 
	} 
 
	function check_username_and_pw($u, $pw) { 
	  $link = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('There was a problem connecting to the database.'); 
 
	  $query = "SELECT * FROM users WHERE username = ? AND password = ? LIMIT 1"; 
	  if($stmt = $link->prepare($query)) { 
	    $p = md5($pw); 
	    $stmt->bind_param('ss', $u, $p); 
	    $stmt->execute(); 
	    $stmt->bind_result($id, $username, $pw); 
	    if($stmt->fetch()) { 
	      $_SESSION['authorized'] = true; 
	      $_SESSION['username'] = $username; 
	      return true; 
	    } else { 
	      return false; 
	    } 
	    $stmt->close(); 
	  } 
	  $link->close(); 
	}

Det er en stor del af kode, og jeg vil gennemgå det. Vores første funktion håndterer, hvornår brugeren poster vores login, og sender derefter dataene til vores check_username_and_pw funktion. Vores logged_in-funktion returnerer blot, om en bruger er logget ind. Vores login_required-funktion kontrollerer, om vi er logget ind, og hvis ikke, sender vi os til login-siden.

Den næste funktion, der blot hedder query() danner en forespørgsel på vores DB og blev oprettet af Jeffrey Way. Jeg tilføjede linkoprettelse og lukkefunktioner for at gøre det endnu nemmere. Vores næste funktion oprettede jeg specielt, så vi nemt kan køre COUNT SQL-forespørgsler, og vores check_username_and_pw-funktion kontrollerer, om vi kan finde en bruger med den samme e-mail og MD5-hashed adgangskode, og i så fald indstiller vores sessionsvariabler.

Trin 3:Applikationslayout

Vores næste fil, vi vil arbejde på, er vores layout.php-fil, så gå videre og opret den. I vores hovedsektion erklærer vi blot vores almindelige XHTML-erklæringer. Hvis du bemærker det, tilføjer vi automatisk sidens titel til en anden streng for vores titel. Så har vi et stylesheet (gå videre og opret det også i vores mediemappe). Hvorefter vi åbner vores body tag, og tjekker om vi vil have et mini layout, og i så fald tilføjer en klasse. Så har vi vores header, og så tjekker vi om vi vil have vores navigation, og hvis vi gør det, viser vi vores faner. Jeg tilføjede også en måde at tilføje en aktuel klasse for hver fane. Vi har også så et logout link, og så har vi vores container div. I dette tilføjer vi et h3-tag med vores titel, og gentager derefter vores indhold.

# admin/layout.php 
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> 
	<html xmlns="http://www.w3.org/1999/xhtml" > 
	    <head> 
	        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
 
	        <title><?php echo $title; ?> » my newsletter app</title> 
	        <!-- Stylesheets --> 
	        <!-- <link rel="stylesheet" href="media/style.css" type="text/css" media="all" /> --> 
	    </head> 
	    <body<?php if ($mini == true) { ?> class="mini"<?php } ?>> 
	        <div id="header"> 
	            <h1><a href="index.php">my newsletter app</a></h1> 
	        </div> 
	        <?php if ($nonav == false) { ?> 
	        <div id="nav"> 
	            <a href="messages.php"<?php if($tab == 'mess') {?>class="current"<?php } ?>>messages</a> 
	            <a href="subscribers.php"<?php if($tab == 'sub') {?>class="current"<?php } ?>>subscribers</a> 
	            <a href="newsletters.php"<?php if($tab == 'nl') {?>class="current"<?php } ?>>newsletters</a> 
	            <a href="templates.php"<?php if($tab == 'temp') {?>class="current"<?php } ?>>templates</a> 
	            <span class="right"> 
	                <a href="logout.php">log out</a> 
	            </span> 
	        </div> 
	        <?php } ?> 
	        <div id="container"> 
	            <h3><?php echo $title;?></h3> 
	            <?php echo $content; ?> 
	        </div> 
	    </body> 
	</html>

Nu skal vi oprette vores index.php-side bare så vi kan style. Åbn index.php og tilføj:

# admin/index.php 
		<?php 
		require_once 'config.php'; 
		$title = "Home!"; 
		$content = <<<EOF 
		<h3>current stats</h3> 
		Our home page! 
		EOF; 
		include 'layout.php'; ?>

Så i dette kræver vi vores konfigurationsfil, sætter vores titel op og sætter derefter vores indholdsvariabel op, og kræver derefter vores layoutfil. Når du åbner det første gang, skulle det se sådan ud:

Åbn nu vores stilark. Jeg kan godt lide at bruge 960.gs reset og typografi stilarter, komprimeret i TextMate. Så toppen af ​​min CSS-fil ser sådan ud:

# admin/media/style.css 
	/* reset */ 
	html,body,div,span,applet,object,iframe,h1,h2,h3,h4,h5,h6,p,blockquote,pre,a,abbr,acronym,address,big,cite,code,del,dfn,em,font,img,ins,kbd,q,s,samp,strike,strong,sub,sup,tt,var,b,u,i,center,dl,dt,dd,ol,ul,li,fieldset,form,label,legend,table,caption,tbody,tfoot,thead,tr,th,td{margin:0;padding:0;border:0;outline:0;font-size:100%;vertical-align:baseline;background:transparent}body{line-height:1}ol,ul{list-style:none}blockquote,q{quotes:none}blockquote:before,blockquote:after,q:before,q:after{content:'';content:none}:focus{outline:0}ins{text-decoration:none}del{text-decoration:line-through}table{border-collapse:collapse;border-spacing:0} 
	/* typography */ 
	body{font:13px/1.5 Helvetica,Arial,'Liberation Sans',FreeSans,sans-serif}a:focus{outline:1px dotted invert}hr{border:0 #ccc solid;border-top-width:1px;clear:both;height:0}h1{font-size:25px}h2{font-size:23px}h3{font-size:21px}h4{font-size:19px}h5{font-size:17px}h6{font-size:15px}ol{list-style:decimal}ul{list-style:square}li{margin-left:30px}p,dl,hr,h1,h2,h3,h4,h5,h6,ol,ul,pre,table,address,fieldset{margin:10px 0;}

Lad os først style vores hovedelementer, så tilføj følgende stilarter:

# admin/media/style.css 
	#header {width:85%; margin:0 auto;} 
	#header h1 a {text-decoration:none; color:#000;} 
	#container {width:85%; background: #111; margin:5px auto; color:#fff; padding:10px;}

Nu skulle din side se sådan ud:

Hvis vi nu styler fanerne med en nav-baggrund og derefter en svævebaggrund på hvert af linkene, og du skulle se:

# admin/media/style.css 
	/* tabs */ 
	#nav {margin:0 auto 2px;padding:10px;width:85%; background:#444;} 
	#nav a { padding:12px 10px; margin:0; color:#fff; text-decoration:none; text-align:center;} 
	#nav a.current, #nav a:hover {background:#111;} 
	#nav span.right {float:right;}

Nu, mens vi arbejder på filen, skal du gå videre og tilføje følgende stilarter til vores minilayout, formularinput, tabeller, store links og vores fejl- og succesmeddelelser.

# admin/media/style.css 
	body.mini #header {width:30%; text-align:center;} 
	body.mini #container {width:30%;} 
 
	/* form */ 
	form input.text {width:95%; font-size:16px;} 
	form textarea {width:95%; height:100%;} 
	/* table */ 
	table {width:98%; text-align:right; border:rgb(128,128,128); font-size:12px; margin:5px 10px; color:#000;background:#fff;} 
	table th {background-color: rgb(229, 229, 229); border:1px solid rgb(187, 187, 187); padding:3px 6px; font-weight:normal; color:#000;} 
	table tr td {border: 1px solid rgb(221, 221, 221); padding:3px 6px;} 
	table tr:hover {background-color: rgb(240, 240, 240);color:#000;} 
	/* a */ 
	a.large {padding: 5px; color:#000; background:#eee; text-decoration:none; margin:5px;} 
	a.large.right {float:right;} 
	a.large:hover, a.large.current {background:#444; color:#fff;} 
	/* messages */ 
	#message {margin: 5px 10px; padding: 4px; display:block;text-align:center;} 
	#message.error {background:#FFEBE8;border: 1px solid #CC0000;color:#CC0000;} 
	#message.success {border:solid 1px #349534; background:#C9FFCA;color:#008000;}

Det er nogle stilarter, som jeg godt kan lide at bruge på tværs af alle mine projekter. Nu hvor vi er færdige med layoutet, vil vi fortsætte til godkendelse.

Trin 4:Godkendelse

Vi kommer til at arbejde med et meget simpelt autentificeringssystem. Opret en login.php og placer følgende inde:

# admin/login.php 
	<?php 
	require_once 'config.php'; 
	if(logged_in()) {header('Location: index.php');} 
	$title = "login"; 
	$nonav = true; 
	$mini = true; 
	if($_POST && (!empty($_POST['username']) ) && (!empty($_POST['password']))) { 
	    validate_user($_POST['username'], $_POST['password']); 
	} 
	$error = $_SESSION['error']; 
	$content = <<<EOF 
	$error 
	<form action="login.php" method="post"> 
	    <p> 
	        <label for="username">username:</label><br /> 
	        <input type="text" name="username" class="text" /> 
	    </p> 
	    <p> 
	        <label for="password">password:</label><br /> 
	        <input type="password" name="password" class="text" /> 
	    </p> 
	    <p> 
	        <input type="submit" value="login" /> 
	    </p> 
	</form> 
	EOF; 
	include 'layout.php'; ?>

Jeg vil forklare hver del af koden. Først kræver vi vores config-fil. Dernæst tjekker vi, om vi er logget ind, og hvis vi er, omdirigerer vi hjem. Dernæst sætter vi titlen og vores layoutmuligheder. Derefter tjekker vi, om vi har en POST, og om POST'en havde et brugernavn og en adgangskode, og hvis det er tilfældet, kalder vi validate_user-funktionen fra vores klassefil. Vi indstiller derefter variabelfejlen til vores sessionsfejl, og derefter sætter vi vores formular op og udlæser eventuelle fejl. Nu skal vi oprette vores logout-side, så opret logout.php og læg følgende i den:

# admin/logout.php 
	<?php 
	require_once 'config.php'; 
	$_SESSION = array(); 
	session_destroy(); 
	header('Location: login.php'); 
	?>

Vi kræver igen vores konfigurationsfil, sætter vores session til et tomt array, ødelægger derefter vores session og omdirigerer til vores login-side. Nu hvor du har gjort alt dette, skulle din login-side se sådan ud:

Vi vil også oprette en brugerpost (og vores tabel), så vi kan tilføje autentificeringslogikken, og du kan se siderne med koden forude. For at oprette en bruger med brugernavnet admin og en hemmelig adgangskode. For at tilføje dette skal du køre denne SQL:

CREATE TABLE `users` ( 
	   `id` int(10) AUTO_INCREMENT, 
	   `username` varchar(50), 
	   `password` varchar(32), 
	   PRIMARY KEY (`id`) 
	) ENGINE=MyISAM DEFAULT CHARSET utf8; 
 
	INSERT INTO `users` (`id`, `username`, `password`) VALUES  
	('1', 'admin', '5ebe2294ecd0e0f08eab7690d2a6ee69');

Trin 5:Nyhedsbreve

Jeg konstruerede denne applikation til at være meget fleksibel. Jeg ønskede, at du (brugeren) kunne oprette og administrere så mange nyhedsbreve, som du vil. Så først skal vi oprette vores databasetabel. Her er SQL-koden fra eksporten på min demoapplikation:

 
	CREATE TABLE `newsletters` ( 
	   `id` int(10) AUTO_INCREMENT, 
	   `name` varchar(50), 
	   `description` varchar(255), 
	   `visible` varchar(10), 
	   PRIMARY KEY (`id`) 
	) ENGINE=MyISAM DEFAULT CHARSET utf8;

Så nu, hvor vi har vores nyhedsbrevstabel, vil vi oprette siderne for hver handling. Opret fire filer med navnet:newsletters.php, newsletters_delete.php, newsletters_edit.php og newsletters_new.php. Åbn først nyhedsbreve.php:

# admin/newsletters.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$title = "newsletters"; 
	$newsletters = query("SELECT * FROM newsletters ORDER BY id ASC"); 
	$tab = 'nl'; 
	$table = ""; 
	foreach($newsletters as $row) { 
	    $dlink = '<a href="newsletters_delete.php?id='.$row['id'].'" onclick="return confirm(\'Are you sure you want to delete this newsletter?\');" title="delete"><img src="media/images/delete.png" alt="delete"/></a>'; 
	    $elink = '<a href="newsletters_edit.php?id='.$row['id'].'" title="edit" ><img src="media/images/page_edit.png" alt="edit"/></a>'; 
	    if($row['visible'] == "1") {$visible = '<img src="media/images/bullet_green.png" />';} else {$visible = '<img src="media/images/bullet_red.png" />';} 
	    $table .= "<tr><td>".$row['id']."</td><td>".$row['name']."</td><td>".$row['description']."</td><td>$visible</td><td>".$dlink." ".$elink."</td></tr>\n"; 
	} 
	$message = error_messages(); 
	$content = <<<EOF 
	<a href="newsletters_new.php" class="large">new newsletter »</a> 
	$message 
	<table> 
	    <tr> 
	        <th></th> 
	        <th>name</th> 
	        <th>description</th> 
	        <th>visible</th> 
	        <th></th> 
	    </tr> 
	    $table 
	</table> 
	EOF; 
	include 'layout.php'; ?>

Så denne fil har den samme grundlæggende følelse af vores login-side. Vi kræver vores konfiguration, sørg for at vi er logget ind, sæt vores titel. Dernæst bruger vi vores query()-funktion til at udføre en SELECT-forespørgsel for at finde alle vores nyhedsbreve. Vi indstiller derefter den aktuelle fane for vores layout. Efter at vi har sløjfet arrayet, der returneres af vores forespørgsel, og oprettet tabellayoutet. Så kalder vi en endnu ukendt funktion og opretter vores side. Før du kan se siden, skal du tilføje følgende til din classes.php-fil for nemt at håndtere vores fejlmeddelelser:

# admin/classes.php 
	// Render error messages 
	function error_messages() { 
	    $message = ''; 
	    if($_SESSION['success'] != '') { 
	        $message = '<span class="success" id="message">'.$_SESSION['success'].'</span>'; 
	        $_SESSION['success'] = ''; 
	    } 
	    if($_SESSION['error'] != '') { 
	        $message = '<span class="error" id="message">'.$_SESSION['error'].'</span>'; 
	        $_SESSION['error'] = ''; 
	    } 
	    return $message; 
	}

Selvom du sandsynligvis ikke vil have nogen data, når du har et par registreringer, vil det se sådan ud:(dog lidt mindre klemt)

Nu skal vi arbejde på vores nye handling, så åbn newsletters_new.php og tilføj følgende:

# admin/newsletters_new.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$tab = 'nl'; 
 
	if(isset($_POST['submitted'])) {  
	    $link = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('There was a problem connecting to the database.'); 
	    $sql = "INSERT INTO NEWSLETTERS (name, description) VALUES ( '".$_POST['name']."' , '".$_POST['description']."' )"; 
	    $stmt = $link->query($sql) or die($link->error); 
	    $stmt->close; 
	    $_SESSION['success'] = "Added newsletter.";  
	    header('Location: newsletters.php'); 
	} 
	$title = "new newsletter"; 
	$content = <<<EOF 
	<form action="newsletters_new.php" method='POST'>  
	    <p> 
	        <label for="name">Name:</label><br /> 
	        <input type='text' name='name' class="text" />  
	    </p> 
	    <p> 
	        <label for="description">Description:</label> 
	        <input type="text" name="description" class="text" />  
	    </p> 
	    <p> 
	        <input type='submit' value='Add Newsletter' /> 
	        <input type='hidden' value='1' name='submitted' />  
	    </p> 
	</form> 
	EOF; 
	include 'layout.php'; ?>

Så jeg håber, du har lagt mærke til mønsteret øverst i hver af vores filer. Vi kræver først vores config.php-fil, så sørg for, at vi er logget ind, og indstil derefter vores nuværende fane, og vi tilføjer så noget ekstra logik til håndtering af POST'er, og så indstiller vi vores titel, vores indhold og render siden. POST-sektionen er ret enkel at forstå, så jeg vil forklare det hurtigt.

Vi tjekker først, om en vare med navnet på den indsendte blev sendt. Dette er det skjulte felt, vi har efter indsend-knappen. Dernæst opretter vi et link til vores database ved hjælp af variablerne fra vores konfigurationsfil. Dernæst opretter vi vores SQL insert-forespørgsel ved hjælp af vores POSTede variable. Dernæst forespørger vi (ikke vores funktion) databasen, og hvis der opstår en fejl, viser vi den returnerede fejl. Dernæst lukker vi forespørgslen, derefter indstiller vi vores succesmeddelelse og omdirigerer derefter til fortegnelsessiden. Din side skal se sådan ud:

Dernæst skal vi arbejde på vores redigeringsside og tilføje følgende:

# admin/newsletters_edit.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$tab = 'nl'; 
 
	if(isset($_POST['submitted'])) {  
	    $link = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('There was a problem connecting to the database.'); 
	    if(isset($_POST['visible'])) {$visible = 1;}else{$visible = 0;} 
	    $sql = "UPDATE NEWSLETTERS SET name='".$_POST['name']."', description='".$_POST['description']."', visible=".$visible." WHERE id=".$_POST['id'].""; 
	    $stmt = $link->query($sql) or die($link->error); 
	    $stmt->close; 
	    $_SESSION['success'] = "Edited newsletter.";  
	    header('Location: newsletters.php'); 
	} 
	$title = "edit newsletter"; 
	$id = (int) $_GET['id']; 
	$results = query("SELECT * FROM newsletters WHERE id='".$id."' LIMIT 1"); 
	$name = $results[0]['name']; 
	$description = $results[0]['description']; 
	$visible = ($results[0]['visible'] == "1") ? 'checked="checked"' : ''; 
	$content = <<<EOF 
	<form action="newsletters_edit.php" method='POST'>  
	    <p> 
	        <label for="name">Name:</label><br /> 
	        <input type='text' name='name' class="text" value="$name" />  
	    </p> 
	    <p> 
	        <label for="description">Description:</label> 
	        <input type="text" name="description" class="text" value="$description" />  
	    </p> 
	    <p> 
	        <label for="visible">Visible:</label> 
	        <input type="checkbox" name="visible" value="true" $visible/> 
	    </p> 
	    <p> 
	        <input type='submit' value='Edit Newsletter' /> 
	        <input type='hidden' value='1' name='submitted' />  
	        <input type='hidden' value='$id' name='id' /> 
	    </p> 
	</form> 
	EOF; 
	include 'layout.php'; ?>

Ligesom alle vores filer starter vi med den samme blok. Efter vores POST-blok (som jeg vil tale om om et sekund), sætter vi id til vores anmodede id, og sørger for, at det er et heltal. Vi bruger derefter vores forespørgselsfunktion til at finde det nyhedsbrev, vi arbejder med, og sætter nogle få variabler til de returnerede resultater. Du kan spørge, hvorfor vi satte en [0], før vi bad om hver værdi, og årsagen er, at forespørgselsfunktionen returnerer en matrix af alle posterne, og hver post er en matrix, så vi skal have adgang til den første matrix i vores resultatvariabel . Linjen, hvor vi sætter variablen synlig ifs, er faktisk en komprimeret if/else-sætning. hvis delen er ==1, så hvis det er sandt, er variablen sat til checket, ellers til ingenting. Så har vi vores formular.

Vores POST-blok minder meget om vores nye side, og vil altid starte på samme måde på tværs af resten af ​​vores sider. Vi kontrollerer derefter, om afkrydsningsfeltet var markeret, og indstiller en variabel her igen. Så har vi vores UPDATE-forespørgsel, kører forespørgslen igen, indstiller vores succesmeddelelse og omdirigerer derefter hjem. Sådan ser formularen ud, og meddelelsen ses efter redigering:

Den sidste side for dette afsnit er den nemmeste, da det er slettesiden. Åbn filen og indsæt til følgende:

# admin/newsletters_delete.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$id = (int) $_GET['id'];  
	$link = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('There was a problem connecting to the database.'); 
	$sql = "DELETE FROM newsletters WHERE id=$id LIMIT 1"; 
	$stmt = $link->query($sql) or die($link->error); 
	if($link->affected_rows) { 
	    $_SESSION['success'] = "Newsletter deleted."; 
	} else { 
	    $_SESSION['error'] = 'Nothing deleted.'; 
	} 
	header('Location: newsletters.php');

I denne blok kræver vi vores config, sørg for, at vi er logget ind, gem derefter det anmodede id til en variabel, opret en MySQL-forbindelse, opsæt vores SQL-forespørgsel, og udfør derefter forespørgslen. Vi tjekker dernæst for at se, om en række var påvirket, og indstiller en besked korrekt. Vi omdirigerer derefter til nyhedsbrevssiden. Tillykke, du er færdig med den første af fire CRUD-sektioner. Dernæst vil vi arbejde på CRUD for vores skabeloner.

Trin 6:Skabeloner

Vores applikation vil også tillade flere skabeloner, alle gemt i databasen. Lad os først oprette vores databasetabel:

 
	CREATE TABLE `templates` ( 
	   `id` int(10) AUTO_INCREMENT, 
	   `name` varchar(50), 
	   `columns` tinyint(5), 
	   `body` text, 
	   PRIMARY KEY (`id`) 
	) ENGINE=MyISAM DEFAULT CHARSET utf8;

Vi har en auto-inkrementering id kolonne, en navn kolonne, en kolonne kolonne for at gemme antallet af kolonner (applikationen skalerer kun til 2 kolonner, hvilket burde være nok, men kan nemt udvides. Dette kunne også bruges til forskellige sektioner .), og vores krop. Ligesom sidste gang skal vi lave hver vores side, og vi vil have en templates.php side, samt templates_new.php, templates_edit.php, templates_delete.php og templates_preview.php. Vi skal først arbejde på vores templates.php-fil, så åbn den og indsæt:

# admin/templates.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$title = "templates"; 
	$tab = 'temp'; 
	$templates = query("SELECT id,name,columns FROM templates ORDER BY id ASC"); 
	$table = ""; 
	foreach($templates as $row) { 
	    $plink = '<a href="" onClick="window.open(\'templates_preview.php?id='.$row['id'].'\',width=800,height=600)" title="preview"><img src="media/images/find.png" alt="preview"/></a>'; 
	    $dlink = '<a href="templates_delete.php?id='.$row['id'].'" onclick="return confirm(\'Are you sure you want to delete this template?\');" title="delete"><img src="media/images/delete.png" alt="delete"/></a>'; 
	    $elink = '<a href="templates_edit.php?id='.$row['id'].'" title="edit"><img src="media/images/page_edit.png" alt="edit"/></a>'; 
	    $table .= "<tr><td>".$row['id']."</td><td>".$row['name']."</td><td>".$row['columns']."</td><td>".$plink." ".$dlink." ".$elink."</td></tr>\n"; 
	} 
	$message = error_messages(); 
	$content = <<<EOF 
	<a href="templates_new.php" class="large">new template »</a> 
	$message 
	<table> 
	    <tr> 
	        <th></th> 
	        <th>name</th> 
	        <th>columns</th> 
	        <th></th> 
	    </tr> 
	    $table 
	</table> 
	EOF; 
	include 'layout.php'; ?>

Igen starter vi med det grundlæggende. Vi laver derefter en forespørgsel for at finde alle vores skabeloner. Vi går derefter gennem hvert array i skabeloner, og vi opretter en tabel. Vi får så vores fejl- (og succes-) beskeder og derefter vores indhold. Din side skal ligne:

Gå nu videre til vores nye side, indsæt følgende:

# admin/templates_new.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$tab = 'temp'; 
	if(isset($_POST['submitted'])) {  
	    $link = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('There was a problem connecting to the database.'); 
	    $sql = "INSERT INTO templates (name, columns, body) VALUES ( '".$_POST['name']."' , ".$_POST['columns'].", '".mysql_real_escape_string($_POST['body'])."' )"; 
	    $stmt = $link->query($sql) or die($link->error); 
	    $stmt->close; 
	    $_SESSION['success'] = "Added template.";  
	    header('Location: templates.php'); 
	} 
	$title = "new template"; 
	$content = <<<EOF 
	<form action="templates_new.php" method='POST'>  
	    <p> 
	        <label for="name">Name:</label><br /> 
	        <input type='text' name='name' class="text" />  
	    </p> 
	    <p> 
	        <label for="columns">Columns</label> 
	        <select name="columns"> 
	            <option value="1">Single Column Layout</option> 
	            <option value="2">Two Column Layout</option> 
	        </select> 
	    </p> 
	    <p> 
	        <label for="description">Body: (raw html)</label><br /> 
	        Use %content% for a single column layout, %leftcol% and %rightcol% for a two column layout.<br /> 
	        <textarea name="body" rows="35"></textarea>  
	    </p> 
	    <p> 
	        <input type='submit' value='Add Template' /> 
	        <input type='hidden' value='1' name='submitted' />  
	    </p> 
	</form> 
	EOF; 
	include 'layout.php'; ?>

Så igen, vi har vores samme header. Vores POST opretter igen en MySQL-forbindelse, så opretter vi vores forespørgsel og bruger mysql_real_escape_string til at tillade alle tegn i posten, og derefter udfører vi vores forespørgsel, indstiller vores succesmeddelelse og omdirigerer til vores skabelonliste. Hvis du kigger på vores formular, beder jeg også om, at der indsættes variabler for vores indhold, og jeg viser dig, hvordan det kommer i spil senere, når vi matcher en besked med en skabelon. Din side skal se sådan ud:

Dernæst skal vi arbejde på vores redigeringsside. Hvis du har bemærket, er meget af denne kode copy and paste på tværs af alle de samme handlinger, så gør det nemt for dig selv.

# admin/templates/edit.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$tab = 'temp'; 
	if(isset($_POST['submitted'])) {  
	    $link = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('There was a problem connecting to the database.'); 
	    $sql = "UPDATE templates SET name='".$_POST['name']."', body='".mysql_real_escape_string($_POST['body'])."', columns=".$_POST['columns']." WHERE id=".$_POST['id'].""; 
	    $stmt = $link->query($sql) or die($link->error); 
	    $stmt->close; 
	    $_SESSION['success'] = "Edited template.";  
	    header('Location: templates.php'); 
	} 
	$title = "edit template"; 
	$id = (int) $_GET['id']; 
	$results = query("SELECT * FROM templates WHERE id='".$id."' LIMIT 1"); 
	$name = $results[0]['name']; 
	$templatedata = stripslashes(htmlspecialchars($results[0]['body'])); 
	$content = <<<EOF 
	<form action="templates_edit.php" method='POST'>  
	    <p> 
	        <label for="name">Name:</label><br /> 
	        <input type='text' name='name' class="text" value="$name"/>  
	    </p> 
	    <p> 
	        <label for="columns">Columns</label> 
	        <select name="columns"> 
	            <option value="1">Single Column Layout</option> 
	            <option value="2">Two Column Layout</option> 
	        </select> 
	    </p> 
	    <p> 
	        <label for="body">Body: (raw html)</label><br /> 
	        Use %content% for a single column layout, %leftcol% and %rightcol% for a two column layout.<br /> 
	        <textarea name="body" rows="35">$templatedata</textarea>  
	    </p> 
	    <p> 
	        <input type='submit' value='Edit Template' /> 
	        <input type='hidden' value='1' name='submitted' />  
	        <input type='hidden' value='$id' name='id' /> 
	    </p> 
	</form> 
	EOF; 
	include 'layout.php'; ?>

We start with the same intro, then our POST block, our title, then our requested id. After, we try and find the template we are working with, then sets three variables so that we can inset them into our content block. We also convert all of the tags we stored to HTML characters so everything will display. When looking at our POST block, you will notice we create our link, then our query and again use mysql_real_escape_string to save everything, execute our query, and then set our message, and redirect to our templates list. Your edit page (with a sample record) should look like:

Now we will create another delete page, so open up our delete page and paste in:

# admin/templates_delete.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$id = (int) $_GET['id'];  
	$link = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('There was a problem connecting to the database.'); 
	$sql = "DELETE FROM templates WHERE id=$id LIMIT 1"; 
	$stmt = $link->query($sql) or die($link->error); 
	if($link->affected_rows) { 
	    $_SESSION['success'] = "Template deleted."; 
	} else { 
	    $_SESSION['error'] = 'Nothing deleted.'; 
	} 
	header('Location: templates.php');

I hope you have picked up the pattern here, this is a very simple page. Now we are going to work on an extra page that is not part of the CRUD spectrum; we are going to create a preview page. The binoculars in the action part on the table is the link for each one (in a new window). So open up our preview page. The page is very simple, we find our template and echo the data, and then append a javascript close button. The code looks like:

# admin/templates_preview.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$id = (int) $_GET['id']; 
	$data = query("SELECT body FROM templates WHERE id=$id LIMIT 1"); 
	$template = $data[0]['body']; 
	?> 
	<?php echo $template; ?> 
	<center><button type="button" onclick="self.close();">close window</button></center>

And an example preview looks like:

Now we have finished with our Templates, we are ready to move onto the next step!

Step 7:Subscribers

So now we are going to work with our subscribers! We are going to create two tables. The first:

CREATE TABLE `subscribers` ( 
	   `id` tinyint(10) AUTO_INCREMENT, 
	   `name` varchar(50), 
	   `email` varchar(50), 
	   PRIMARY KEY (`id`) 
	) ENGINE=MyISAM DEFAULT CHARSET utf8;

Refers to each subscriber, and the second:

CREATE TABLE `subscriptions` ( 
	   `id` tinyint(10) AUTO_INCREMENT, 
	   `subscriber_id` tinyint(10), 
	   `newsletter_id` tinyint(10), 
	   PRIMARY KEY (`id`) 
	) ENGINE=MyISAM DEFAULT CHARSET utf8;

Creates a table for our many-to-many relationship with our newsletters. A subscriber can have multiple subscription to newsletters, so they can subscribe to multiple ones, and each newsletter can have many subscribers. To create the most dynamic solution, we have a linking table.

Let's first create our files. The files we are going are going to have are subscribers.php, subscribers_delete.php, and subscribers_edit.php. Our create action will be created later for the front-end. First open up subscribers.php and paste in:

# admin/subscribers.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$title = "subscribers"; 
	$tab = 'sub'; 
	$table = ""; 
	$messages = query("SELECT * FROM subscribers ORDER BY id ASC"); 
	foreach($messages as $row) { 
		$dlink = '<a href="subscribers_delete.php?id='.$row['id'].'" onclick="return confirm(\'Are you sure you want to delete this subscriber?\');" title="delete"><img src="media/images/delete.png" alt="delete"/></a>'; 
		$elink = '<a href="subscribers_edit.php?id='.$row['id'].'" title="edit"><img src="media/images/page_edit.png" alt="edit"/></a>'; 
		$table .= '<tr><td>'.$row['id'].'</td><td>'.$row['name'].'</td><td>'.$row['email'].'</td><td>'.$dlink.' '.$elink.'</td></tr>'; 
	} 
	$message = error_messages(); 
	$content = <<<EOF 
	$message 
	<table> 
		<tr> 
			<th></th> 
			<th>name</th> 
			<th>email</th> 
			<th></th> 
		</tr> 
		$table 
	</table> 
	EOF; 
	include 'layout.php'; ?>

We have basically the same listing pages as before, except this time we will be finding our subscribers. Your page (with some sample data) should look like:

Now we will move on to our edit page:

# admin/subscribers_edit.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$tab = 'sub'; 
 
	if(isset($_POST['submitted'])) {  
	    $id = (int) $_POST['id']; 
	    $link = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('There was a problem connecting to the database.'); 
	    $sql = "UPDATE subscribers SET name='".$_POST['name']."', email='".$_POST['email']."' WHERE id=$id"; 
	    $stmt = $link->query($sql) or die($link->error); 
	    $stmt->close; 
 
	    foreach($_POST['newsletter'] as $n) { 
	        if($n['exists'] != '1' && $n['subscribe'] == "true") { // If we want to subscribe but the record doesnt exist 
	            $nlid = $n['nlid']; 
	            $sql = "INSERT INTO subscriptions (subscriber_id, newsletter_id) VALUES ('$id', '$nlid')"; 
	            $stmt = $link->query($sql) or die($link->error); 
	            $stmt->close; 
	        } elseif ($n['exists'] == '1' && $n['subscribe'] != "true") {// Else if we had an exits but we want to unsubscribe 
	            $subid = $n['subid']; 
	            $sql = "DELETE FROM subscriptions WHERE id=$subid LIMIT 1"; 
	            $stmt = $link->query($sql) or die($link->error); 
	            $stmt->close; 
	        } 
	    } 
	    $_SESSION['success'] = "Edited subscriber.";  
	    header('Location: subscribers.php'); 
	} 
	$title = "edit newsletter"; 
	$id = (int) $_GET['id']; 
 
	$subscriber = query("SELECT * FROM subscribers WHERE id='$id'"); 
	$name = $subscriber[0]['name']; 
	$email = $subscriber[0]['email']; 
 
	$newsletters = query("SELECT * FROM newsletters"); 
	$subs = query("SELECT * FROM subscriptions WHERE subscriber_id='".$id."'"); 
	$subscriptions = ''; 
	foreach($newsletters as $nl) { 
	    $s = false; 
	    $subid = ''; 
	    foreach($subs as $sub) { 
	        if($sub['newsletter_id'] == $nl['id']) {$s = true; $subid = $sub['id'];} 
	    } 
	    $checked = ($s == true) ? 'checked="checked"' : ''; 
	    $subscriptions .= ' 
	    <input type="checkbox" name="newsletter['.$nl["id"].'][subscribe]" value="true" '.$checked.'/> 
	    <label for="newsletter['.$nl["id"].']">'.$nl['name'].'</label> 
	    <input type="hidden" name="newsletter['.$nl["id"].'][exists]" value="'.$s.'" /> 
	    <input type="hidden" name="newsletter['.$nl["id"].'][nlid]" value="'.$nl['id'].'" /> 
	    <input type="hidden" name="newsletter['.$nl["id"].'][subid]" value="'.$subid.'" /><br /> 
	    '; 
 
 
	} 
	$content = <<<EOF 
	<form action="subscribers_edit.php" method='POST'>  
	    <p> 
	        <label for="name">Name:</label><br /> 
	        <input type='text' name='name' class="text" value="$name" />  
	    </p> 
	    <p> 
	        <label for="email">Email</label><br /> 
	        <input type="text" name="email" class="text" value="$email" />  
	    </p> 
	    <p> 
	        <strong>Newsletters:</strong><br /> 
	        $subscriptions 
	    </p> 
	    <p> 
	        <input type='submit' value='Edit Subscriber' /> 
	        <input type='hidden' value='1' name='submitted' />  
	        <input type='hidden' value='$id' name='id' /> 
	    </p> 
	</form> 
	EOF; 
	include 'layout.php'; ?>

This page is fairly different so I will explain each part. The header is the same we have been using. I'll skip the POST block and come back to it. We then continue the same code. We next find our current subscriber. Next we find all newsletters (this includes ones that are not visible - visible mean visible to the public) and then all of the subscriber's subscriptions. We next loop through every newsletter record returned, we next reset some values. Next, we loop through every subscription the user has, and if the subscription's newsletter_id is equal to the current newsletter we are looping we set $s true, and $subid equal to the subscription id. We then set the variable $checked equal to either checked or nothing depending on whether a subscription was found for this subscriber and the current newsletter in the loop. Next we create the checkbox form area, with a lot of hidden fields. First, we have the actual checkbox with a name that will create an array for each checkbox. We then have our label, and next we output whether or not the subscription exists, the newsletter_id and then the subscription_id for when the subscription exists. After which we have our normal content.

Now, if we move on to our POST block. We first get the id posted from our hidden field at the bottom. We next create our MySQL link. Next we have our first SQL query where we update the subscriber record. Next we loop through every newsletter checkbox. The first conditional statement checks to see if the POSTed data says we do not have an existing subscription, and the user wants to subscribe to the newsletter. To handle this, we are going to perform a SQL INSERT into our subscriptions table where our subscriber_id is the same as the user_id we are editing, and newsletter_id equal to the 'nlid' value POSTed by one of our hidden fields. We then execute that SQL INSERT query. The elseif conditional statement says that if our subscription exists, but the checkbox was unchecked so we unsubscribe, we need to delete the subscription. We handle this with a SQL DELETE query. To form our query we set $subid equal to the posted value for our 'subid'. We then create our query by deleting the record where the subscription id equals our variable of $subid. Next we execute the query, set our session success message, and then redirect back to our subscribers page. Your final edit page should look like:(filled with sample data)

We have one last page to work on for the subscribers part of the backend:the delete page. Just like before, this page is very simple:

# admin/subscribers_delete.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$id = (int) $_GET['id'];  
	$link = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('There was a problem connecting to the database.'); 
	$sql = "DELETE FROM subscribers WHERE id=$id LIMIT 1"; 
	$stmt = $link->query($sql) or die($link->error); 
	if($link->affected_rows) { 
	    $_SESSION['success'] = "Subscriber deleted."; 
	} else { 
	    $_SESSION['error'] = 'Nothing deleted.'; 
	} 
	header('Location: subscribers.php');

Step 8:Messages

I will tell you upfront, this section has the most pages. We will be working with seven now, and creating one more in Step 10. First, we are going to create our messages table with this SQL:

CREATE TABLE `messages` ( 
	   `id` tinyint(10) AUTO_INCREMENT, 
	   `subject` varchar(255), 
	   `leftcol` text, 
	   `rightcol` text, 
	   `template_id` tinyint(10), 
	   PRIMARY KEY (`id`) 
	) ENGINE=MyISAM DEFAULT CHARSET utf8;

Next, we'll create the files for this step. Creates seven files, each named messages.php, messages_delete.php, messages_edit.php, messages_new.php, messages_new_step2.php, messages_new_step3.php, and messages_preview.php. Let's first open up messages.php and make it look like:

# admin/messages.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$title = "messages"; 
	$tab = 'mess'; 
	$table = ""; 
	$messages = query("SELECT * FROM messages ORDER BY id ASC"); 
	foreach($messages as $row) { 
	    $slink = '<a href="messages_send.php?id='.$row['id'].'" title="send message"><img src="media/images/email_go.png" alt="send message"/></a>'; 
	    $plink = '<a href="messages_preview.php?id='.$row['id'].'" target="_new" title="preview"><img src="media/images/find.png" alt="preview"/></a>'; 
	    $dlink = '<a href="messages_delete.php?id='.$row['id'].'" onclick="return confirm(\'Are you sure you want to delete this message?\');" title="delete"><img src="media/images/delete.png" alt="delete"/></a>'; 
	    $elink = '<a href="messages_edit.php?id='.$row['id'].'" title="edit"><img src="media/images/page_edit.png" alt="edit"/></a>'; 
	    $table .= '<tr><td>'.$row['id'].'</td><td>'.$row['subject'].'</td><td><a href="" onClick="window.open(\'templates_preview.php?id='.$row['template_id'].'\',width=800,height=600)" title="preview"><img src="media/images/find.png" alt="preview"/></a></td><td>'.$slink.' '.$plink.' '.$dlink.' '.$elink.'</td></tr>'; 
	} 
	$message = error_messages(); 
	$content = <<<EOF 
	<a href="messages_new.php" class="large">new message »</a> 
	$message 
	<table> 
	    <tr> 
	        <th></th> 
	        <th>subject</th> 
	        <th>template</th> 
	        <th></th> 
	    </tr> 
	    $table 
	</table> 
	EOF; 
	include 'layout.php'; ?>

This is our routine table, except we now have 4 'extra' links now, one to send the message, one to preview, one to edit, and one to delete. Your page should look like:

Now we are going to start work on our new pages. The first page is where all messages start out, and then you can progress on and enter the actual message on the next page. The reason for this is because we first need to create the initial message in the DB and so we can find information about the template. The step2 page is basically the edit page (there are six line differences according to FileMerge). Open up our new file and paste the following:

# admin/messages_new.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$tab = 'mess'; 
	if(isset($_POST['subject'])) {  
	    $link = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('There was a problem connecting to the database.'); 
	    $sql = "INSERT INTO messages (subject, template_id) VALUES ( '".$_POST['subject']."' , ".$_POST['template'].")"; 
	    $stmt = $link->query($sql) or die($link->error);     
	    $i = query("SELECT id FROM messages WHERE subject='".$_POST['subject']."' AND template_id=".$_POST['template']." "); 
	    $id = $i[0]['id']; 
	    $stmt->close; 
	    $_SESSION['success'] = "Added template.";  
	    header('Location: messages_new_step2.php?id=' + $id); 
	} 
	$title = "new message"; 
	$templates = query("SELECT id,name,columns FROM templates"); 
	$tselect = '<select name="template">'; 
	foreach($templates as $row) { 
	    $tselect .= '<option value="'.$row['id'].'">'.$row['name'].'</option>'; 
	} 
	$tselect .= "</select>"; 
	$content = <<<EOF 
	<form action="messages_new.php" method='POST'>  
	    <p> 
	        <label for="subject">Subject:</label><br /> 
	        <input type='text' name='subject' class="text" />  
	    </p> 
	    <p> 
	        <label for="template">Template:</label> 
	        $tselect 
	    </p> 
	    <p> 
	        <button onclick="">Continue »</button> 
	    </p> 
	</form> 
	EOF; 
	include 'layout.php'; ?>

This page is very similar to what our other new pages look like, but this one was one change in the POST block. Right after we perform the SQL INSERT, we find the most recent insert id. Now this is not the perfect solution, but I prefer it to performing another SQL query to find a row using unindexed columns. This step should look like:

We then redirect to step2, so let's open up the file:

# admin/messages_new_step2.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$title = "new message - step 2"; 
	$tab = 'mess'; 
	$id = (int) $_GET['id']; 
 
	$mess = query("SELECT * FROM messages WHERE id=$id"); 
	$message = $mess[0]; 
	$subject = $message['subject']; 
 
	$templates = query("SELECT id,name,columns FROM templates"); 
	$tselect = '<select name="template">'; 
	foreach($templates as $row) { 
	    if($message['template_id'] == $row['id']) { 
	        $selected = ' selected="selected"'; 
	        if($row['columns'] == "1") { 
	            $textareas = '<p><label for="body">Body: (raw html)</label><br /><textarea name="body" rows="35"></textarea></p>'; 
	        } else { 
	            $textareas = '<p><label for="leftcol">Left column: (raw html)</label><br /><textarea name="leftcol" rows="35"></textarea></p> 
	            <p><label for="rightcol">Right column: (raw html)</label><br /><textarea name="rightcol" rows="35"></textarea></p>'; 
	        } 
 
	    } else {$selected = '';} 
	    $tselect .= '<option value="'.$row['id'].'"'.$selected.'>'.$row['name'].'</option>'; 
	} 
	$tselect .= '</select>'; 
 
	// Check for a POST 
	if(isset($_POST['submitted'])) {  
	    $link = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('There was a problem connecting to the database.'); 
		$template = query("SELECT columns FROM templates WHERE id=".$message['template_id']); 
	    if($template[0]['columns'] == "1") { 
	        $body = mysql_real_escape_string($_POST['body']); 
	        $sql = "UPDATE messages SET subject='".$_POST['subject']."', leftcol='$body' WHERE id=$id"; 
	    } else { 
	        $leftcol = mysql_real_escape_string($_POST['leftcol']); 
	        $rightcol = htmlentities($_POST['rightcol']); 
	        $sql = "UPDATE messages SET subject='".$_POST['subject']."', leftcol='$leftcol', rightcol='$rightcol' WHERE id=$id"; 
	    } 
	    $stmt = $link->query($sql) or die($link->error); 
	    $stmt->close; 
	    header('Location: messages_new_step3.php?id='.$id); 
	} 
 
	$content = <<<EOF 
	<form action="messages_new_step2.php?id=$id" method='POST'>  
	    <p> 
	        <label for="subject">Subject:</label><br /> 
	        <input type='text' name='subject' class="text" value="$subject"/>  
	    </p> 
	    <p> 
	        <label for="template">Template:</label> 
	        $tselect 
	    </p> 
	    $textareas 
	    <p> 
	        <input type='submit' value='Continue »' /> 
	        <input type='hidden' value='1' name='submitted' /> 
	    </p> 
	</form> 
	EOF; 
	include 'layout.php'; ?>

Hopefully you have gotten the gist of all the pages and understand the page above. We have our normal heading. we then set our id from our GET request. Next we find the message we are working with, then we find all the templates and construct a drop down. We also use this look to define whether we will have one or two textareas. Next we have our POST block, which creates the link, then checks to see if we are working with one or two columns and creates the appropriate SQL query. After that we have our form. Your form should look like:

Now we will continue onto step 3, so open up the file and paste:

# admin/messages_new_step3.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$title = "new message - step 3"; 
	$id = (int) $_GET['id']; 
	$tab = 'mess'; 
 
	$mess = query("SELECT * FROM messages WHERE id=$id"); 
	$message = $mess[0]; 
	$subject = $message['subject']; 
 
	$content = <<<EOF 
	<a href="messages_preview.php?id=$id" class="large" target="_new">preview »</a><br /> 
	<p>Do you want to <a href="messages.php" class="large">return to messages</a> or <a href="messages_send.php?id=$id" class="large">send the message</a>?</p> 
	EOF; 
	include 'layout.php'; 
	?>

The page is very simple and is the end of creating a message. It offers us a few links. The first is a link to preview the message. The next offers to take us back home. The third offers to take us to send the message (Step 10). The page looks like:

Now we are going to continue on to our edit page. I will not explain it as it is the same file as messages_new_step2.php, so you can refer there.

# admin/messages_edit.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$title = "edit message"; 
	$id = (int) $_GET['id']; 
	$tab = 'mess'; 
 
	$mess = query("SELECT * FROM messages WHERE id=$id"); 
	$message = $mess[0]; 
	$subject = $message['subject']; 
 
	$templates = query("SELECT id,name,columns FROM templates"); 
	$tselect = '<select name="template">'; 
	foreach($templates as $row) { 
	    if($message['template_id'] == $row['id']) { 
	        $selected = ' selected="selected"'; 
	    } else {$selected = '';} 
	    $tselect .= '<option value="'.$row['id'].'"'.$selected.'>'.$row['name'].'</option>'; 
	} 
	$tselect .= '</select>'; 
 
	$mid = $message['template_id']; 
	$template = query("SELECT id,name,columns FROM templates WHERE id=$mid"); 
	if($template[0]['columns'] == "1") { 
	    $textareas = '<p><label for="body">Body: (raw html)</label><br /><textarea name="body" rows="35">'.$message['leftcol'].'</textarea></p>'; 
	} else { 
	    $textareas = '<p><label for="leftcol">Left column: (raw html)</label><br /><textarea name="leftcol" rows="35">'.$message['leftcol'].'</textarea></p> 
	    <p><label for="rightcol">Right column: (raw html)</label><br /><textarea name="rightcol" rows="35">'.$message['rightcol'].'</textarea></p>'; 
	} 
 
	// Check for a POST 
	if(isset($_POST['submitted'])) {  
	    $link = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('There was a problem connecting to the database.'); 
	    if($template[0]['columns'] == "1") { 
	        $body = mysql_real_escape_string($_POST['body']); 
	        $sql = "UPDATE messages SET subject='".$_POST['subject']."', leftcol='$body' WHERE id=$id"; 
	    } else { 
	        $leftcol = mysql_real_escape_string($_POST['leftcol']); 
	        $rightcol = htmlentities($_POST['rightcol']); 
	        $sql = "UPDATE messages SET subject='".$_POST['subject']."', leftcol='$leftcol', rightcol='$rightcol' WHERE id=$id"; 
	    } 
	    $stmt = $link->query($sql) or die($link->error); 
	    $stmt->close; 
	    $_SESSION['success'] = "Edited message.";  
	    header('Location: messages.php'); 
	} 
 
	$content = <<<EOF 
	<form action="messages_edit.php?id=$id" method='POST'>  
	    <p> 
	        <label for="subject">Subject:</label><br /> 
	        <input type='text' name='subject' class="text" value="$subject"/>  
	    </p> 
	    <p> 
	        <label for="template">Template:</label> 
	        $tselect 
	    </p> 
	    $textareas 
	    <p> 
	        <input type='submit' value='Save »' /> 
	        <input type='hidden' value='1' name='submitted' /> 
	    </p> 
	</form> 
	EOF; 
	include 'layout.php'; ?>

The page will look almost identical to our step 2, but the textarea will have content. Now we will create the delete page with:

# admin/messages_delete.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$id = (int) $_GET['id'];  
	$link = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('There was a problem connecting to the database.'); 
	$sql = "DELETE FROM messages WHERE id=$id LIMIT 1"; 
	$stmt = $link->query($sql) or die($link->error); 
	if($link->affected_rows) { 
	    $_SESSION['success'] = "Message deleted."; 
	} else { 
	    $_SESSION['error'] = 'Nothing deleted.'; 
	} 
	header('Location: messages.php'); ?>

That page should also look familiar. The final page we are going to work on in this step is our preview page, so open it up and place:

# admin/messages_preview.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$id = (int) $_GET['id']; 
 
	$mess = query("SELECT * FROM messages WHERE id=$id"); 
	$message = $mess[0]; 
	$subject = $message['subject']; 
	$tid = $message['template_id']; 
 
	$data = query("SELECT body,columns FROM templates WHERE id=$tid LIMIT 1"); 
	$template = $data[0]['body']; 
 
	if($data[0]['columns'] == "1") { 
	    $leftcol = $message['leftcol']; 
	    $body = str_replace('%content%', $leftcol, $template); 
	} else { 
	    $leftcol = $message['leftcol']; 
	    $rightcol = $message['rightcol']; 
	    $b = str_replace('%leftcol%', $leftcol, $template); 
	    $body = str_replace('%rightcol%', $rightcol, $b); 
	} 
	?> 
	<?php echo $body; ?> 
	<button type="button" onclick="self.close();">close window</button>

This file is somewhat different than you have seen, so I'll walk you through it. First have have our normal heading. Next we find the current message we are working with, and set a few variables to the results. Next we find the template we are working with and set a variable equal to the body. Next, we have a conditional statement that checks to see the number of columns the template has. If it has we use the PHP function str_replace to replace the %content% tag we have with our actual content. Otherwise, we first perform a str_replace for the left column, and then on the result of that we perform str_replace again for the right column. Now we are ready to continue onto the front-end.

Step 9:The Front-End

We have finally reached the front-end! For this step and this step only, I will assume the files we are working with are in the root of the project (so not the admin folder, the one containing it). We are going to be working with four files here, so go ahead and create index.php, preferences.php, subscribe.php and a style.css file. First open up our index.php file and paste:

# index.php 
	<?php 
	require_once 'admin/config.php'; 
	$newsletters = query("SELECT * FROM newsletters WHERE visible=1"); 
	$subscriptions = ''; 
	foreach($newsletters as $nl) { 
	    $subscriptions .= ' 
	    <input type="checkbox" name="newsletter['.$nl["id"].'][subscribe]" value="true" '.$checked.'/> 
	    <label for="newsletter['.$nl["id"].']">'.$nl['name'].'</label> 
	    <input type="hidden" name="newsletter['.$nl["id"].'][nlid]" value="'.$nl['id'].'" /><br /> 
	    '.$nl["description"].'<br /> 
	    '; 
	} 
	?> 
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> 
	<html xmlns="http://www.w3.org/1999/xhtml" > 
	    <head> 
	        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
 
	        <title>my newsletters</title> 
	        <!-- Stylesheets --> 
	        <link rel="stylesheet" href="style.css" type="text/css" media="all" /> 
	    </head> 
	    <body> 
	        <div id="header"> 
	            <h1>my newsletters</h1> 
	        </div> 
	        <div id="container"> 
	            <h3>Subscribe to our newsletters!</h3> 
	            <form action="subscribe.php" method="POST"> 
	                <p> 
	                    <label for="name">Name:</label><br /> 
	                    <input type='text' name='name' class="text" />  
	                </p> 
	                <p> 
	                    <label for="email">Email</label><br /> 
	                    <input type="text" name="email" class="text" />  
	                </p> 
	                <p> 
	                    <strong>Newsletters:</strong><br /> 
	                    <?php echo $subscriptions; ?> 
	                </p> 
	                <p> 
	                    <input type='submit' value='Subscribe »' /> 
	                    <input type='hidden' value='1' name='submitted' />  
	                </p> 
	            </form> 
	        </div> 
	    </body> 
	</html>

I'll explain the page first and then we will get to the picture so-far and the page styling. In the PHP section at the top we require our config.php file (now in the admin directory), then find all of our publicly visible newsletters and create a check box array. You will notice that we are not handling the POSTed data here, and I chose to do that in our subscribe.php, and we will get to that, but first let's style the page. The page should currently look like:

First I added the 960.gs reset file like I did in our other stylesheet. Then I added the three following styles to make the design look like:

# style.css 
	#header, #container {width:65%;margin:0 auto; padding:0.7%;} 
	#container {background:#ccc;} 
	form input.text {width:95%; font-size:16px;} 
	#message.success {border:solid 1px #349534; background:#C9FFCA;color:#008000;}

So now that we have a clean and simple page, we are going to continue on and work on our subscribe.php file. Go ahead and open the file and paste:

# subscribe.php 
	<?php 
	require_once 'admin/config.php'; 
 
	if(isset($_POST['submitted'])) {  
	    $link = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('There was a problem connecting to the database.'); 
	    $name = $_POST['name']; 
	    $email = $_POST['email']; 
 
	    $sql = "INSERT INTO subscribers (name, email) VALUES ('$name', '$email')"; 
	    $stmt = $link->query($sql) or die($link->error); 
	    $stmt->close; 
 
	    $sql = "SELECT id FROM subscribers WHERE name='$name' AND email='$email' LIMIT 1"; 
	    $subscriber = query($sql); 
	    $id = $subscriber[0]['id']; 
 
	    foreach($_POST['newsletter'] as $n) { 
	        if($n['subscribe'] == "true") { // If we want to subscribe but the record doesnt exist 
	            $nlid = $n['nlid']; 
	            $sql = "INSERT INTO subscriptions (subscriber_id, newsletter_id) VALUES ('$id', '$nlid')"; 
	            $stmt = $link->query($sql) or die($link->error); 
	            $stmt->close; 
	        }  
	    } 
	} else {header('Location: index.php');} 
	?> 
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> 
	<html xmlns="http://www.w3.org/1999/xhtml" > 
	    <head> 
	        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
 
	        <title>my newsletters</title> 
	        <!-- Stylesheets --> 
	        <link rel="stylesheet" href="style.css" type="text/css" media="all" /> 
	    </head> 
	    <body> 
	        <div id="header"> 
	            <h1>my newsletters</h1> 
	        </div> 
	        <div id="container"> 
	            <h3>Thank you for subscribing!</h3> 
	        </div> 
	    </body> 
	</html>

This page is very much like our edit subscribers page, but no DELETE SQL queries happen here. We simply check to make sure we have all POSTed data. We then set a few variables to our POSTed data, and then create and perform a SQL INSERT query to add the person to our subscribers table. After which we perform a SQL query to find that just created subscriber (insert_id was not working this time for me). We then loop through all of the POSTed newsletters and check to see if we want to subscribe to them, and perform SQL INSERTs when needed. If all goes to plan, you see a nice screen like the one below:

We have on last page here to work on, and that is the preferences.php file. This is where a user can edit their email subscription. I am going to split the page in two. First we have our PHP block:

# preferences.php 
	<?php 
	require_once 'admin/config.php'; 
 
	if(isset($_POST['submitted'])) {  
	    $id = (int) $_POST['id']; 
	    $link = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('There was a problem connecting to the database.'); 
	    $sql = "UPDATE subscribers SET name='".$_POST['name']."', email='".$_POST['email']."' WHERE id=$id"; 
	    $stmt = $link->query($sql) or die($link->error); 
	    $stmt->close; 
 
	    foreach($_POST['newsletter'] as $n) { 
	        if($n['exists'] != '1' && $n['subscribe'] == "true") { // If we want to subscribe but the record doesnt exist 
	            $nlid = $n['nlid']; 
	            $sql = "INSERT INTO subscriptions (subscriber_id, newsletter_id) VALUES ('$id', '$nlid')"; 
	            $stmt = $link->query($sql) or die($link->error); 
	            $stmt->close; 
	        } elseif ($n['exists'] == '1' && $n['subscribe'] != "true") {// Else if we had an exits but we want to unsubscribe 
	            $subid = $n['subid']; 
	            $sql = "DELETE FROM subscriptions WHERE id=$subid LIMIT 1"; 
	            $stmt = $link->query($sql) or die($link->error); 
	            $stmt->close; 
	        } 
	    } 
	    $_SESSION['success'] = "Preferences saved.";  
	} 
 
	if(isset($_GET['email'])) {$email = $_GET['email']; $display = 'form';} else {$display = 'find';} 
 
	$subscriber = query("SELECT * FROM subscribers WHERE email='$email'"); 
	if($subscriber || $display == 'find') { 
	    $id = $subscriber[0]['id']; 
	    $name = $subscriber[0]['name']; 
	    $email = $subscriber[0]['email']; 
	} else {header('Location: index.php');} 
 
	$newsletters = query("SELECT * FROM newsletters WHERE visible=1"); 
	$subs = query("SELECT * FROM subscriptions WHERE subscriber_id='".$id."'"); 
	$subscriptions = ''; 
	foreach($newsletters as $nl) { 
	    $s = false; 
	    $subid = ''; 
	    foreach($subs as $sub) { 
	        if($sub['newsletter_id'] == $nl['id']) {$s = true; $subid = $sub['id'];} 
	    } 
	    $checked = ($s == true) ? 'checked="checked"' : ''; 
	    $subscriptions .= ' 
	    <input type="checkbox" name="newsletter['.$nl["id"].'][subscribe]" value="true" '.$checked.'/> 
	    <label for="newsletter['.$nl["id"].']">'.$nl['name'].'</label> 
	    <input type="hidden" name="newsletter['.$nl["id"].'][exists]" value="'.$s.'" /> 
	    <input type="hidden" name="newsletter['.$nl["id"].'][nlid]" value="'.$nl['id'].'" /> 
	    <input type="hidden" name="newsletter['.$nl["id"].'][subid]" value="'.$subid.'" /><br /> 
	    '; 
	}  
	$message = error_messages(); 
	?>

In this block, a lot is going on. First, we include our config file. Next, we check for a POST, and if we have one, we update our database. This portion is copied exactly from our subscribers_edit.php file so you can look there for a bit more explanation. Next depending on if we have a get request, we set our variable (this variable is used in the HTML section of the page). We then look for a subscriber with that email, and if one exists or we are showing the find portion, we continue, otherwise we are redirected home. Next we find all of our newsletters, and all of the subscriber's subscriptions, and then create our checkbox form. The HTML portion looks like:

# preferences.php 
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> 
	<html xmlns="http://www.w3.org/1999/xhtml" > 
	    <head> 
	        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
 
	        <title>my newsletters - my preferences</title> 
	        <!-- Stylesheets --> 
	        <link rel="stylesheet" href="style.css" type="text/css" media="all" /> 
	    </head> 
	    <body> 
	        <div id="header"> 
	            <h1>my newsletters</h1> 
	        </div> 
	        <div id="container"> 
	            <h3>my preferences</h3> 
	            <?php if($display == 'form') {?> 
	            <form action="preferences.php" method="POST"> 
	                <p> 
	                    <label for="name">Name:</label><br /> 
	                    <input type='text' name='name' class="text" value="<?php echo $name; ?>"/>  
	                </p> 
	                <p> 
	                    <label for="email">Email</label><br /> 
	                    <input type="text" name="email" class="text" value="<?php echo $email; ?>"/>  
	                </p> 
	                <p> 
	                    <strong>Newsletters:</strong><br /> 
	                    <?php echo $subscriptions; ?> 
	                </p> 
	                <p> 
	                    <input type='submit' value='Save my preferences »' /> 
	                    <input type='hidden' value='1' name='submitted' />  
	                    <input type='hidden' value='<?php echo $id; ?>' name='id' /> 
	                </p> 
	            </form> 
	            <?php } else { ?> 
	            <?php echo $message; ?> 
	            <form action='preferences.php' method="get"> 
	                <p> 
	                    <label for="email">Email</label><br /> 
	                    <input type="text" name="email" class="text" />  
	                </p> 
	                <p> 
	                    <input type='submit' value='Find »' /> 
	                </p> 
 
	            </form> 
	            <?php } ?> 
	        </div> 
	    </body> 
	</html>

In our HTML block we have two forms and some PHP to choose which one to display. The top form is the form the user sees if a record in the database has been found. The second form is for entering your email and having the system find it. The second form looks like:

And the first looks like:

And the second form after we saved our preferences:

Now that we have finished the front-end, we have one last step:sending the emails!

Step 10:Sending Messages

Our last step is to work on the page to send our message. We will be working in the admin directory, and only one file will be created. Go ahead and create our messages_send.php file and place the following in it:

# admin/messages_send.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$title = "send message"; 
	$id = (int) $_GET['id']; 
	$tab = 'mess'; 
 
	if(isset($_POST['submitted'])) {  
	    $query = "SELECT * FROM subscribers WHERE id=0 "; 
	    $emails = array(); 
	    foreach($_POST['newsletter'] as $n) { 
	        if($n['send'] == "true") { 
	            $nlid = $n['nlid']; 
	            $e = query("SELECT subscriber_id FROM subscriptions WHERE newsletter_id=$nlid"); 
	            foreach($e as $s) { 
	                $sqlids .= " OR id=".$s['subscriber_id']; 
	            } 
	            $query .= $sqlids; 
	        } 
	    } 
	    $subscribers = query($query); 
	    foreach($subscribers as $sub) { 
	        $emails[$sub['email']] = $sub['name']; 
	    } 
	    $from = array(FROM_EMAIL => FROM_NAME); 
	    // BODY RENDERING 
	    $mess = query("SELECT * FROM messages WHERE id=$id"); 
	    $message = $mess[0]; 
	    $subject = $message['subject']; 
	    $tid = $message['template_id']; 
 
	    $data = query("SELECT body FROM templates WHERE id=$tid LIMIT 1"); 
	    $template = $data[0]['body']; 
 
	    if($message['rightcol'] == '') { 
	        $leftcol = $message['leftcol']; 
	        $body = str_replace('%content%', $leftcol, $template); 
	    } else { 
	        $leftcol = $message['leftcol']; 
	        $rightcol = $message['rightcol']; 
	        $b = str_replace('%leftcol%', $leftcol, $template); 
	        $body = str_replace('%rightcol%', $rightcol, $b); 
	    } 
 
	    send_email_to_mass($from, $emails, $body, $subject) or die('lol'); 
	    header('Location: index.php'); 
	} 
 
	$newsletters = query("SELECT * FROM newsletters"); 
	foreach($newsletters as $nl) { 
	    $nls .= ' 
	    <input type="hidden" name="newsletter['.$nl["id"].'][nlid]" value="'.$nl['id'].'" /> 
	    <input type="checkbox" name="newsletter['.$nl["id"].'][send]" value="true" '.$checked.'/> 
	    <label for="newsletter['.$nl["id"].']">'.$nl['name'].'</label> - '.$nl['description'].'<br /> 
	    '; 
	} 
	$mess = query("SELECT * FROM messages WHERE id=$id"); 
	$message = $mess[0]; 
	$subject = $message['subject']; 
 
	$content = <<<EOF 
	<a href="messages_preview.php?id=$id" class="large" target="_new">preview »</a><br /> 
	<form action='messages_send.php?id=$id' method="POST"> 
	    <p> 
	        Subject: $subject<br /> 
	    </p> 
	    <p>Send to:<br /> 
	        $nls 
	    </p> 
	    <p> 
	        <input type='submit' value='Send »' /> 
	        <input type='hidden' value='1' name='submitted' /> 
	    </p> 
	</form> 
	EOF; 
	include 'layout.php'; ?>

The first part we again require our config, then make sure the user is logged in, then our title, make sure our id is an integer, and then set our tab. Next we have our complicated post block. First we set up our base query, and running just that would return 0 records, which is good because that means no users will be send the newsletter. Next we loop through every newsletter that we want to send to, and find all of the subscriptions for that newsletter. We then create a string that will be appended to our original SQL query so that we can find every subscriber. Now, we run that query and create an array where the keys are the emails and the name is the value, and this helps us use names when the user looks at the email in their mail application, showing the TO:as their name. We next find the message we are working with, and set the subject, message, and template id to variables. We then find our template and set the body to a variable. Then we use the same code from the message preview to replace the strings inside the template the the parts of the message. Then we call our yet-to-be-created-function send_email_to_mass and then redirect home.

Leaving our POST block, we create the same checkbox list of newsletters so the admin can pick which one(s) he wants to send the message to. Then we have a simple form that looks like:

Now, open up our classes.php file and add the following function:

# admin/classes.php 
	// EMAIL 
	function send_email_to_mass($from, $recipients, $body, $subject) { 
	    require_once 'swift/lib/swift_required.php'; //require lib 
 
	    $transport = Swift_MailTransport::newInstance(); 
	    $mailer = Swift_Mailer::newInstance($transport) or die('Error creating mailer.'); 
	    $message = Swift_Message::newInstance($subject) 
	        ->setFrom($from) 
	        ->setTo($recipients) 
	        ->setBody($body, 'text/html') or die('error here.'); 
	    $result = $mailer->batchSend($message); 
 
	    return true; 
	}

So first, we have our function declaration, and it expects four variables to be passed to it, from, recipients, body, and subject. Next we require the sqift_required.php file of our Swift Mailer Library. Next we create a new Mail Transport (this uses the PHP mail function, so it would be sending from your local machine, for the documentation on the three transport types, see the documentation). Next we create a mailer using that transport. Then we create a new message from our subject, then set our from, to, and body. Then we use the batch_send function so that each recipient only sees themselves on the email, and no one else.

There is one possibly downside of doing it the way I have, and that is if you are sending many messages, the page may take forever to load. A solution to tthis would be running a Javascript AJAX request to send each and every message, but I won't cover that here. Now that we have finished working on sending messages, we are going to spice up the home page and then we will be done!

Step 11:The Homepage

When you load the admin index, the page does not really do much. I want to have some 'stats' on our homepage, and we will finally use the count_query function. Open up the admin index file and change it to look like:

# admin/index.php 
	<?php 
	require_once 'config.php'; 
	login_required(); 
	$users = count_query("SELECT COUNT(*) AS num FROM users"); 
	$emails = count_query("SELECT COUNT(*) AS num FROM subscribers"); 
	$subs = count_query("SELECT COUNT(*) AS num FROM subscriptions"); 
	$nls = count_query("SELECT COUNT(*) AS num FROM newsletters"); 
	$mess = count_query("SELECT COUNT(*) AS num FROM messages"); 
	$temps = count_query("SELECT COUNT(*) AS num FROM templates"); 
	$title = "Home!"; 
	$content = <<<EOF 
	<h3>current stats</h3> 
	<p>$users user registered</p> 
	<p>$emails subscribers</p> 
	<p>$subs newsletter subscriptions</p> 
	<p>$nls newsletters</p> 
	<p>$mess messages</p> 
	<p>$temps templates</p> 
	EOF; 
	include 'layout.php'; ?>

The page is very simple. We require our config, make sure we are logged in, then we perform six count queries, one for each of our tables and then output that. This is what the final page look like: