Display other data based on dropdown selection

[JayPawar]

hello i have a dropdown box where i have populated values from the sql database.

 

no when i select a value from the drop dopwn, i want to display all the records related to that value under the dropdown.

here is my code

 

<?php
$select=FALSE; 
require_once ("configFile.php");
$result=mysql_query("SELECT Registration_No FROM vehicle_master ");


if($result == FALSE) 
{
    die(mysql_error()); // TODO: better error handling
}
//populate dropdown with vehicles
//echo "<label>Select vehicle number :   </label>";


//echo "<select name='vehicles'>"; 
//while ($row = mysql_fetch_array($result)) 
//{
//    echo "<option value='numberPlate'>" . $row['Registration_No'] . "</option>";
//}
//echo "</select>";
//echo "<br><br>";
// $select=isset($_POST['vehicles']);
   ?>
<form id="form1" name="form1" method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?> ">
   
   <?php 
    echo "<select name='select'>";
   $list=mysql_query("SELECT * from vehicle_master");
while($row_list=mysql_fetch_assoc($list))
{ ?> 


<option value="<?php echo $row_list['Registration_No']; ?>" 
<?php 
if($row_list['Registration_No']==$select)
{ echo "selected"; } 
?>>
<?php echo $row_list['Registration_No']; ?>
</option>
<?php
}


?> 
</select> 
<input type="submit" name="Submit" value="select" />
</form>


<br>
<?php 
if (isset($_POST['SELECT'])) {
$Registration_Nos=mysql_real_escape_string($_POST['SELECT']);
$result=mysql_query("SELECT * FROM vehicle_master WHERE Registration_No='".$Registration_Nos."'");
while ($row=mysql_fetch_assoc($result)) 
{ 
echo "".$row['Emergency_Contact_1']."";
}


}?>.

can anyone tell me where am i going wrong ?

 

control.php

[gristoi]

you may want to look at using jquery and ajax to achieve what you want

[Strider64]

It's a little tricky using just straight PHP, but it can be done

function displayDir($pdo, $name) {
try { // Fetch the images:
$query = 'Select id, thumbnail, picName, subDirectory, user_name FROM pictures WHERE subDirectory=:subDirectory ORDER BY id ASC';
$result = $pdo->prepare($query);
$result->execute(array(':subDirectory' => $name));
if ($result && $result->rowCount() > 0) { // Check that rows were returned:
  $result->setFetchMode(PDO::FETCH_CLASS, 'StoredPictures'); // Arm the image class by fetching it:
} else { // Problem!
  throw new Exception('No content is available to be viewed at this time');
}
} catch (Exception $e) { // Catch generic exceptions
}
return $result;	
}
/* Display images & thumbnails when user selects directory */
if (isset($_POST['imageDir']) && $_POST['imageDir'] == 'selected') {
$_SESSION['name'] = $_POST['childName']; // Assign category to path:  
$name = $_SESSION['name'];
$resultDir = displayDir($pdo, $name);
}

    <form class="selectDir" id="selectDir" action="imageGallery.php" method="post">
      <input type="hidden" name="imageDir" value="selected">
      <label class="mySelect" for="mySelection">Choose Directory</label>
      <select class="mySelection" id="mySelection" name="childName">
        <?php echo '<option value="' . $name . '">' . ucfirst($name) . '</option>' ?>
        <option value="ava">Ava</option>
        <option value="cammi">Cammi</option>
        <option value="carter">Carter</option>
        <option value="grant">Grant</option>
        <option value="jayreed">JayReed</option>
        <option value="nolan">Nolan</option>
      </select>
      <input class="submitCat" type="submit" name="submitImages" value="Enter">
    </form>

<div class="container photogallery">
  <div class="row bg-header-part3"></div>
  <ul class="row">
    <?php
        $x = 1;
        if (isset($resultDir)) {
          while ($pictures = $resultDir->fetch()) {
            echo  '<li><a class="links" href="' . htmlspecialchars($pictures->getPicName()) . '" ><img data-pic="' . $x . '" class="thumbnails" src="' . htmlspecialchars($pictures->getThumbnail()) . '" alt="Thumbnails"></a></li>';
            $x += 1;
          }
        }
    ?>
  </ul>
</div>

Though I do use jquery and ajax for the rest, but this gives the web page Graceful Degradation for people who disable JavaScript. Getting back to the script, the main important thing I want to show you is the form itself, I don't propagate the whole form in php (you could though) I just do the part where it's needed. Maybe just looking over the form and maybe glancing over the first script might help you out?