Question

I am currently working with a Dependable dropdown menu that functions with the help of jQuery and PHP. The values are being pulled of MySQL database. Is there away to php echo the selected value of a dependable drop down menu?

EXAMPLE

HTML/PHP

<form action="" method="post">

        <select name="gender" id="gender" class="update">
            <option value="">Select one</option>
            <?php if (!empty($list)) { ?>
                <?php foreach($list as $row) { ?>
                    <option value="<?php echo $row['id']; ?>">
                        <?php echo $row['name']; ?>
                    </option>
                <?php } ?>
            <?php } ?>
        </select>

        <select name="category" id="category" class="update"
            disabled="disabled">
            <option value="">----</option>
        </select>

        <select name="colour" id="colour" class="update"
            disabled="disabled">
            <option value="">----</option>
        </select>

</form>

Answer 1

Please add jquery.js.
your html code

    <select name="gender" id="gender" class="update">
        <option value="">Select one</option>
        <?php if (!empty($list)) { ?>
            <?php foreach($list as $row) { ?>
                <option value="<?php echo $row['id']; ?>">
                    <?php echo $row['name']; ?>
                </option>
            <?php } ?>
        <?php } ?>
    </select>

    <select name="category" id="category" class="update" disabled="disabled">
        <option value="">----</option>
    </select>

    <select name="colour" id="colour" class="update" disabled="disabled">
        <option value="">----</option>
    </select>
        //jquery code for source list
    <script type="text/javascript">
        $(document).ready(function(){
            $('#gender').change(function() {
              if ($(this).val()!='') {
                $("#category").load("postfile.php",{gender_id: $(this).val()});
                $("#category").removeAttr('disabled');
              }
            });
            //code on change of sel_source
            $('#category').change(function() {
              if ($(this).val()!='') {
                $("#colour").load("postfile.php",{category_id: $(this).val()});
                $("#colour").removeAttr('disabled');
              }

            });
        });
    </script> 



//postfile.php
//your mysql connection other things goes here
//code for category
$objDb = new PDO('mysql:host=localhost;dbname=dbname', 'ur_username', 'ur_password');
if(isset($_REQUEST['gender_id']) && !empty($_REQUEST['gender_id'])) {

           $sql = "SELECT * FROM `categories` WHERE `master` = ?";
    $statement = $objDb->prepare($sql);
    $statement->execute(array($_REQUEST['gender_id']));
    $list = $statement->fetchAll(PDO::FETCH_ASSOC);

    if(!empty($list)) {
        $output = '<option value="">Select</option>';
        foreach($list as $row) {              
                $output .= '<option value="'.$row['id'].'">'.$row['name'].'</option>';
        }
    } else {
        $output = '<option value="">Select</option>';
    }
    echo $output;
} 
//code for color

if(isset($_REQUEST['category_id']) && !empty($_REQUEST['category_id'])) {
    $sql = "SELECT * FROM `categories` WHERE `master` = ?";
    $statement = $objDb->prepare($sql);
    $statement->execute(array($_REQUEST['category_id']));
    $list = $statement->fetchAll(PDO::FETCH_ASSOC);
     if(!empty($list)) {
        $output = '<option value="">Select</option>';
        foreach($list as $row) {          
                $output .= '<option value="'.$row['id'].'">'.$row['name'].'</option>';
        }
    } else {
        $output = '<option value="">Select</option>';
    }
    echo $output;
} 

Hope this will help you.