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POdynamic drop down box?
 

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  1. POdynamic drop down box?
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    <p>I got a database table called category as shown:</p> <p><img src="https://i.stack.imgur.com/NlhpV.png" alt="enter image description here"></p> <p>I am trying to do a dynamic drop down box and the index script is shown as:</p> <pre><code>&lt;?php try { $objDb = new PDO('mysql:host=localhost;dbname=test', 'root', ''); $objDb-&gt;exec('SET CHARACTER SET utf8'); $sql = "SELECT * FROM `category` WHERE `master` = 0"; $statement = $objDb-&gt;query($sql); $list = $statement-&gt;fetchAll(PDO::FETCH_ASSOC); } catch(PDOException $e) { echo 'There was a problem'; } ?&gt; &lt;!DOCTYPE HTML&gt; &lt;html lang="en"&gt; &lt;head&gt; &lt;meta charset="utf-8" /&gt; &lt;title&gt;Dependable dropdown menu&lt;/title&gt; &lt;meta name="description" content="Dependable dropdown menu" /&gt; &lt;meta name="keywords" content="Dependable dropdown menu" /&gt; &lt;link href="/css/core.css" rel="stylesheet" type="text/css" /&gt; &lt;!--[if lt IE 9]&gt; &lt;script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"&gt;&lt;/script&gt; &lt;![endif]--&gt; &lt;script src="/js/jquery-1.6.4.min.js" type="text/javascript"&gt;&lt;/script&gt; &lt;script src="/js/core.js" type="text/javascript"&gt;&lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;div id="wrapper"&gt; &lt;form action="" method="post"&gt; &lt;select name="gender" id="gender" class="update"&gt; &lt;option value=""&gt;Select one&lt;/option&gt; &lt;?php if (!empty($list)) { ?&gt; &lt;?php foreach($list as $row) { ?&gt; &lt;option value="&lt;?php echo $row['id']; ?&gt;"&gt; &lt;?php echo $row['name']; ?&gt; &lt;/option&gt; &lt;?php } ?&gt; &lt;?php } ?&gt; &lt;/select&gt; &lt;select name="category" id="category" class="update" disabled="disabled"&gt; &lt;option value=""&gt;----&lt;/option&gt; &lt;/select&gt; &lt;select name="colour" id="colour" class="update" disabled="disabled"&gt; &lt;option value=""&gt;----&lt;/option&gt; &lt;/select&gt; &lt;/form&gt; &lt;/div&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>The update.php is shown as:</p> <pre><code>&lt;?php if (!empty($_GET['id']) &amp;&amp; !empty($_GET['value'])) { $id = $_GET['id']; $value = $_GET['value']; try { $objDb = new PDO('mysql:host=localhost;dbname=test', 'root', ''); $objDb-&gt;exec('SET CHARACTER SET utf8'); $sql = "SELECT * FROM `category` WHERE `master` = ?"; $statement = $objDb-&gt;prepare($sql); $statement-&gt;execute(array($value)); $list = $statement-&gt;fetchAll(PDO::FETCH_ASSOC); if (!empty($list)) { $out = array('&lt;option value=""&gt;Select one&lt;/option&gt;'); foreach($list as $row) { $out[] = '&lt;option value="'.$row['id'].'"&gt;'.$row['name'].'&lt;/option&gt;'; } echo json_encode(array('error' =&gt; false, 'list' =&gt; implode('', $out))); } else { echo json_encode(array('error' =&gt; true)); } } catch(PDOException $e) { echo json_encode(array('error' =&gt; true)); } } else { echo json_encode(array('error' =&gt; true)); } </code></pre> <p>The 2nd drop down box is not showing the values dependent on the 1st drop down box as shown:</p> <p><img src="https://i.stack.imgur.com/Il9Ce.png" alt="enter image description here"> </p> <p>Can someone help me please.</p>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USmunue
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    1. This table or related slice is empty.
    1. PL
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      1. LTLinked
    2. PL
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      1. LTLinked
    3. PL
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      1. LTLinked
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. COToo much code. :(
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      1. POdynamic drop down box?
      1. USPraveen Kumar Purushothaman
    2. COI don't understand what you are trying to do! Just post relevant code as rendered client side, not the php server side code. BTW, are you using only one table? Purpose of this?
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      1. POdynamic drop down box?
      1. USA. Wolff
    3. COwhen the 1st drop down box is selected, the 2nd drop down box should show jumper and shirt. Whichever you select for example, if i now select jumper the 3rd drop down should show the color black.
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      1. POdynamic drop down box?
      1. USmunue
 

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