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PHP\HTML script til automatisk at udfylde formularfelter, når et element er valgt fra en rulleliste

Jeg ville gøre dette ved at bruge Ajax og JQuery. Du skal gøre 3 ting - Tilføj Ajax/JQuery-kode i head af dokument, opret php-fil, som Ajax kan oprette forbindelse til, og tilføj onChange , id &værdi attributter til felter.

I din tilføj dette javascript efter din -

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>
<script type="text/javascript">
function check(){   
    var pipeno = $('#pipeno').val();
    if(pipeno != "pipeno"){
      jQuery.ajax({
      type: "POST",
      url: "check.php",
      data: 'pipeno='+pipeno,
      cache: false,
      success: function(response){
     var response_array = JSON.parse(response);
     $('#wallthickness').val(response_array['wallthickness']);  
     $('#jointno').val(response_array['jointno']);
     $('#measuredlength').val(response_array['measuredlength']);
     $('#serialno').val(response_array['serialno']);}
    });
    }
    else{
         $('#wallthickness').val('');   
     $('#jointno').val('');
     $('#measuredlength').val('');
     $('#serialno').val('');}
    }
</script>

Opret derefter en fil med navnet check.php med kode -

<?php
 //Php Code to connect to postgresqldatabase
 include ("connection.php");
 // Code to pull data from the database and load onto the form  
 $pipeno = pg_escape_string($_POST['pipeno']);
 $query = "SELECT * FROM fieldtally WHERE pipeno = $pipeno ";
 $result = pg_query($db_handle,$query); 
 $row = pg_fetch_row($result))
 $row_info = array('wallthickness'=>$row[1],'jointno'=>$row[2],'measuredlength'=>$row[3],'serialno'=>$row[4]);

 $row_info = json_encode($row_info);
 print_r($row_info); 
?>

Og til sidst tilføjer du id &værdi attributter til dine formularfelter (Lad være med at ændre din fil, bare opdater disse linjer)

Select Pipe No:<select name="pipeno" id="pipeno" onChange="check()"><option value="pipeno"> --Select-- </option> 
...  (keep your database connection / how you create your dropdown, etc here, just edit the option below)
 echo "<option value=\"$pipeno\"> $pipeno</option>";
... (keep your database connection / how you create your dropdown, etc. here)
</select> 
...
Input Joint No: <input type="text" name="jointno" id="jointno">
Input Wall Thickness: <input type="text" name="wallthickness" id="wallthickness">
Input measured Length: <input type="text" name="measuredlength" id="measuredlength">
Input Serial No: <input type="text" name="serialno" id="serialno">

OPDATERET 10/19 Grundet ændret kode -

Jeg har sat nummererede ankre i din kode, og noterne er til sidst. Du kan gøre alt dette i 2 filer, men den anden fil check1.php , kan kun have 1 databaseforespørgsel, ellers vil du have fejl i din ajax.

autopopulate.php-

<!-- #1 -->
<?php
//Php Code to connect to postgresqldatabase
$PGHOST = "localhost:25376";
$PGDATABASE = "Pipeline";
$PGUSER = "postgres";
$PGPASSWORD = "Casa2009";
$PGPORT = 5432;
$db_handle = pg_connect("dbname=$PGDATABASE user=$PGUSER password=$PGPASSWORD");

//<!-- #2 -->
 if(isset($_POST['submit_1'])){
 //Code to post data to the database
 $pipeno = pg_escape_string( $_POST['pipeno']);
 $wallthickness = pg_escape_string($_POST['wallthickness']);
 $heatno1 = pg_escape_string( $_POST['heatno1']);
 $pipeno2 = pg_escape_string( $_POST['pipeno2']);
 $heatno2 = pg_escape_string($_POST['heatno2']);
 $jointno = pg_escape_string($_POST['jointno']);
 $measuredlength = pg_escape_string($_POST['measuredlength']);
 $serialno = pg_escape_string($_POST['serialno']); 
 $wthick= pg_escape_string($_POST['wthick']);

//<!-- #3 -->
 $query = "INSERT INTO fieldtally1(pipeno,wallthickness,heatno1,pipeno2,heatno2,jointno,measuredlength,serialno,wthick)VALUES ('$pipeno','$wallthickness','$heatno1','$pipeno2','$heatno2','$jointno','$measuredlength','$serialno','$wthick') ON DUPLICATE KEY UPDATE wallthickness='$wallthickness',heatno1='$heatno1',pipeno2='$pipeno2',heatno2='$heatno2',jointno='$jointno',measuredlength='$measuredlength',serialno='$serialno',wthick='$wthick'";

//<!-- #4a -->
 $result = pg_query($query);
 if (!$result) {
 $errormessage = pg_last_error();
 $message = "Error with query: " . $errormessage;
 }
 $message = sprintf ("These values were inserted into the database - %s %s %s %s %s %s %s %s %s",$pipeno,$wallthickness,$heatno1,$pipeno2,$heatno2,$jointno,$measuredlength,$serialno,$wthick);
 }

 // Code to pull data from the database and load onto the form
 $query = 'select pipeno, wallthickness from fieldtally1 order by pipeno asc'; 
 $result = pg_query($db_handle,$query); 
 while ($row = pg_fetch_row($result))
 {
    // Creates Arrays to use in dropdowns
     $pipeno_array[] = $row[0];
     $wallthickness_array[] = $row[1];
 } 

  // This function creates dropdowns that can be used in your forms
 function dropdown($field_name, $num){
     // Creates the Dropdown
 //<!-- #5a -->
     $c = ($field_name == 'pipeno') ? ' onChange="check('.$num.');"' : '';
     echo "<select name=\"".$field_name."\" id=\"".$field_name.$num."\"$c>\n";
     echo "<option value=\"\"> --- Select --- </option>\n";
     // Chooses which array to use for Dropdown options
     global $pipeno_array, $wallthickness_array;
     $name_array = ($field_name == 'pipeno') ? $pipeno_array : $wallthickness_array;
     // Creates the Dropdown options based off the array above
     foreach($name_array as $k){
         echo "<option value=\"$k\">$k</option> \n"; }
     // Ends the Dropdown
     echo "</select>\n";
 }

 ?>
 <html>
     <head><title>UG Pipeline Field Data Capture</title></head>
      <body>
       <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>
       <script type="text/javascript">
 <!-- #5b -->
        function check(num){
           var pipeno_id = '#pipeno_'+num;
           var pipeno = $(pipeno_id).val();
           if(pipeno != ""){
             jQuery.ajax({
             type: "POST",
             url: "check1.php",
             data: 'pipeno='+pipeno,
             cache: false,
             success: function(response){
             var response_array = JSON.parse(response);
             $('#heatno1').val(response_array['heatno1']);
             $('#pipeno2').val(response_array['pipeno2']); 
             $('#heatno2').val(response_array['heatno2']);
             $('#jointno').val(response_array['jointno']);
             //$('#measuredlength').val(response_array['measuredlength']); // this should be input from the user
            // $('#serialno').val(response_array['serialno']);  //This should also be input from the user
            }           
            });
           }
           else{
           $('#heatno1').val('');
           $('#pipeno2').val('');
           $('#heatno2').val('');
           $('#jointno').val('');}
            }
  </script> 

 <!-- #4b -->
 <?php printf($message);?>
 <!-- #6.1 -->
 <form action="" method="post">
 <table width="800" cellpadding= "10" cellspacing="1" border="2">
 <tr align="center" valign="top">
 <td align="center" colspan="1" rowspan="1" bgcolor="#64b1ff">
 <h3>Input Field Tally Information</h3>
      Select Pipe Thickness:<select name="wthick" id="wthick">
 <!-- #7.1 -->
  <option value=""> --Select-- </option> 
  <option value="9.8">  9.8  </option>
  <option value="13.5"> 13.5 </option>
  <option value="15.9"> 15.9 </option>
  </Select>           
 Select Pipe No:<?php dropdown('pipeno', 1); ?>  Select Wall Thickness:<?php dropdown('wallthickness', 1); ?><br /><br /> 
 HeatNo1: <input type="text" name="heatno2" id="heatno1"> PipeNo2: <input type="text" name="pipeno2" id="pipeno1"> HeatNo2: <input type="text" name="heatno2" id="heatno2"><br /><br /> 
 Joint No: <input type="text" name="jointno"> Input measured Length: <input type="text" name="measuredlength"> Input Serial No: <input type="text" name="serialno"><br><br> 
 <!-- #8.1 -->
 <input type="Submit" name="submit_1" value="Submit">
 <!-- #9.1 -->
 </td></tr></table></form>
 <p></p>

 <!-- #6.2 -->
 <form action="" method="post">
 <table width="800" cellpadding= "10" cellspacing="1" border="2">
 <tr align="center" valign="top">
 <td align="center" colspan="1" rowspan="1" bgcolor="#ff9d9d">
 <h3>Input Field Bend Information</h3>
  Select Wall Thickness:<select name="wallthickness" id="wallthickness">
 <!-- #7.2 -->
     <option value=""> --Select-- </option> 
     <option value="9.8">  9.8  </option>
     <option value="13.5">13.5 </option>
     <option value="15.9"> 15.9 </option>
  </select>
 <!-- #10.1 -->           
 Select Pipe No:<?php dropdown('pipeno', 2); ?>  Select Wall Thickness:<?php dropdown('wallthickness', 2); ?><br /><br /> 
 HeatNo1: <input type="text" name="heatno1" id="heatno1_2"> PipeNo2: <input type="text" name="pipeno2" id="pipeno2_2"> HeatNo2: <input type="text" name="heatno2" id="heatno2_2"><br /><br /> 
 Joint No: <input type="text" name="jointno"> Input Measured Distance: <input type="text" name="measureddistance"><br><br> 
 Input Bend Angle: <input type="text" name="benddegree"> Input Bend Type: <input type="text" name="bendtype"><br><br>
 <!-- #8.2 -->
 <input type="Submit" name="submit_2" value="Submit">
 <!-- #9.2 -->
 </td></tr></table></form>
 <p></p>

 <!-- #6.3 -->
 <form action="" method="post">
 <table width="800" cellpadding= "10" cellspacing="1" border="2">
 <tr align="center" valign="top">
 <td align="center" colspan="1" rowspan="1" bgcolor="#66CC66">
 <h3>Input App. Tally Information</h3>
 <!-- #11 -->
      Select Wall Thickness:<select name="wallthickness1" id="wallthickness1">
 <!-- #7.3 -->
     <option value=""> --Select-- </option> 
     <option value="9.8">  9.8  </option>
     <option value="13.5"> 13.5 </option>
     <option value="15.9"> 15.9 </option>
  </select>
 <!-- #10.2 -->             
 Select Pipe No:<?php dropdown('pipeno', 3); ?>  Select Wall Thickness:<?php dropdown('wallthickness', 3); ?><br /><br />            
 Input Tally Type: <input type="text" name="type">   Input Serial No: <input type="text" name="serialno"><br><br>
 Input Reference ID: <input type="text" name="referenceid"><br><br>
 <!-- #8.3 -->
 <input type="Submit" name="submit_3" value="Submit">
 </td></tr></table>
 </form>
 </body>
 </html>

check1.php-

<?php
//Php Code to connect to postgresqldatabase
$PGHOST = "localhost:25376";
$PGDATABASE = "Pipeline";
$PGUSER = "postgres";
$PGPASSWORD = "Casa2009";
$PGPORT = 5432;
$db_handle = pg_connect("dbname=$PGDATABASE user=$PGUSER password=$PGPASSWORD");

// Code to pull data from the database and load onto the form  
$pipeno = pg_escape_string($_POST['pipeno']);
$query = "SELECT * FROM fieldtally1 WHERE pipeno = $pipeno ";
$result = pg_query($db_handle,$query); 
$row = pg_fetch_row($result);
$row_info = array('heatno1'=>$row[1],'pipeno2'=>$row[2],'heatno2'=>$row[3],'jointno'=>$row[4]);
$row_info = json_encode($row_info);
print_r($row_info); 
?>

Her er problemerne-

1 - Flyt alle scripts til toppen af ​​siden. Dette vil:(1) rydde op i din kode, (2) være i stand til at behandle alle databaseforespørgsler på samme tid.

2 - Din forespørgsel om at opdatere fieldtally1 er nu færdig, før du får dine dropdowns fra databasen.

3 - For at løse dit andet problem efter indtastning af data i inputfelterne og klik på send. den opretter en ny post i databasen i stedet for at udfylde de nødvendige kolonner i databasen brug INDSÆT I ... VÆRDIER ... PÅ DUBLIKAT NØGLEOPDATERING ... . Hvis pipeno er allerede i databasen (da det er en Primær nøgle ) vil den OPDATERE i stedet for INSERT .

4 - Jeg anbefaler at gemme din fejl eller succes besked (#4a) og ekko den øverst i din html (#4b).

5a - Du skiftede fra en hårdkodet pipeno dropdown, tilbage til den dynamiske dropdown ved hjælp af funktionen. Så du mangler javascriptet - onChange=check(); 5b - nu hvor du opretter din pipeno &onChange=check(); dynamisk skal du ændre din check() funktion for også at få id'et dynamisk.

6 - $PHP_SELF er ikke gyldig. Jeg tror, ​​du prøvede $_SERVER['PHP_SELF'] , men dette er let hacket, så det er bedre bare at bruge action="" . [6.1,6.2,6.3]

7 - Når du laver din