PHP select onchange not working
Question
So i am creating <select id="VersionDropdown" onchange="change(this)"></select> inside of a php file that is then pulled into another php document via include tags. The problem that i am having is that onchange is never fired off. I have tried using jQuery.change() as well with no success.
I am using jQuery 1.9.1
PHP:
<?php
// Build the dropdown menu based on files on the server
$dropdown = '<select id="VersionDropdown" onchange="change(this)">';
$path = './myPath/';
$blacklist = array('.', '..', 'SQL Files');
foreach (new DirectoryIterator($path) as $root) {
if($root->isDot()) continue;
$path2 = $path . $root . '/';
$MajorVersion = $root->getFilename();
$MajorVersion = str_replace('v', 'Version ', $MajorVersion);
if(fnmatch('Version 3.1', $MajorVersion)){ $MajorVersion = str_replace('Version', 'Analog Version', $MajorVersion); }
//$versions[$MajorVersion] = array();
$dropdown .= '<optgroup label="' .$MajorVersion. '">';
foreach (new DirectoryIterator($path2) as $folder) {
if($folder->isDot()) continue;
$item = $folder->getFilename();
//$versions[$MajorVersion][$item] = array();
if ($handle = opendir($path2 . $item)) {
while (false !== ($file = readdir($handle))) {
if (!in_array($file, $blacklist)) {
if(fnmatch("*.txt", $file)) {
$fileNew = str_replace('.txt', '', $file);
$versions[$MajorVersion][$item]['Version'] = $fileNew;
$dropdown .= '<option value="' .str_replace('Web', '', $item). '">' .$fileNew. '</option>';
}else{
$versions[$MajorVersion][$item][str_replace('.exe', '', $file)] = $file;
}
}
}
}
closedir($handle);
}
}
$dropdown .= '</optgroup>';
//print_r($versions);
$dropdown .= '</select>';
echo $dropdown;
?>
HTML/PHP
<html>
<title>Test Script</title>
<head>
<meta http-equiv="Content-type" content="text/html;charset=UTF-8" />
<title>Test</title>
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script>
function change(version){
alert(version);
}
$( document ).ready(function() {
});
</script>
</head>
<body>
<?php include './php/version_dropdown.php'; ?>
</body>
</html>
version_download.php output:
<select id="VersionDropdown" onchange="change(this)">
<optgroup label="Version 5.5">
<option value="55249">5.5.24.9</option>
<option value="55225">5.5.22.5</option>
<option value="55205">5.5.20.5</option>
<option value="55183">5.5.18.3</option>
<option value="55163">5.5.16.3</option>
<option value="55141">5.5.14.1</option>
<option value="55122">5.5.12.2</option>
<option value="55106">5.5.10.6</option>
</optgroup>
<optgroup label="Version 5.0">
<option value="50016">5.0.0.16</option>
<option value="50018">5.0.0.18</option>
<option value="50022">5.0.0.22</option>
<option value="50024">5.0.0.24</option>
<option value="50284">5.0.28.4</option>
<option value="50304">5.0.30.4</option>
<option value="50321">5.0.32.1</option>
<option value="50343">5.0.34.3</option>
<option value="50403">5.0.40.3</option>
</optgroup>
<optgroup label="Version 4.3">
<option value="43062">4.3.0.62</option>
<option value="43064">4.3.0.64</option>
<option value="43066">4.3.0.66</option>
</optgroup>
<optgroup label="Version 4.2">
</optgroup>
<optgroup label="Analog Version 3.1">
</optgroup>
</select>
5 answers
solution1
0 2014-02-19 19:47:48
Have you tried something like this?
$("#VersionDropdown").change(function(){
if($(this).val() == "something") {
//do something
}
});
solution2
0 2014-02-19 20:02:27
Try this (Edited):
$("#VersionDropdown>optgroup>option").on('click', function(event) {
alert($(this).text());
});
When you insert a element, after the document charged, you have to use the .on() or .live() function to make it work.
solution3
0 2014-02-19 21:51:11
You're sending an object to the function onchange="change(this)"
Change function to:
function change(version){
alert(version.value);
}
Or change the onchange to
onchange="change(this.value)"
jQuery not required for the above.
NOTE only one of the changes above should be made. If you make both you'll be errors
solution4
0 2014-02-20 00:40:32
I inserted the output of your php code into the html source that you showed, giving me something that almost worked. All I then had to do was to write alert(version.value); instead of alert(version); , and I was in business. I cannot understand why that does not work for you - please confirm that this works for you, or compare with the source code that you actually get from the server:
<html>
<title>Test Script</title>
<head>
<meta http-equiv="Content-type" content="text/html;charset=UTF-8" />
<title>Test</title>
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script>
function change(version){
alert(version.value); // <<<<<<<< this line was changed >>>>>>>>>>>
}
$( document ).ready(function() {
});
</script>
</head>
<body>
<!-- <<<<<<<<<<<<<< inserted php generated code here as plain text >>>>>>>>>>>> -->
<select id="VersionDropdown" onchange="change(this)">
<optgroup label="Version 5.5">
<option value="55249">5.5.24.9</option>
<option value="55225">5.5.22.5</option>
<option value="55205">5.5.20.5</option>
<option value="55183">5.5.18.3</option>
<option value="55163">5.5.16.3</option>
<option value="55141">5.5.14.1</option>
<option value="55122">5.5.12.2</option>
<option value="55106">5.5.10.6</option>
</optgroup>
<optgroup label="Version 5.0">
<option value="50016">5.0.0.16</option>
<option value="50018">5.0.0.18</option>
<option value="50022">5.0.0.22</option>
<option value="50024">5.0.0.24</option>
<option value="50284">5.0.28.4</option>
<option value="50304">5.0.30.4</option>
<option value="50321">5.0.32.1</option>
<option value="50343">5.0.34.3</option>
<option value="50403">5.0.40.3</option>
</optgroup>
<optgroup label="Version 4.3">
<option value="43062">4.3.0.62</option>
<option value="43064">4.3.0.64</option>
<option value="43066">4.3.0.66</option>
</optgroup>
<optgroup label="Version 4.2">
</optgroup>
<optgroup label="Analog Version 3.1">
</optgroup>
</select>
</body>
</html>
Just one other observation (which I assume to be a typo; but maybe it's the source of your problem). You are #include ing version_dropdown.php , but you call the file whose contents you are showing version_download.php . Typo? Or source of your problem... I have to believe it's a typo.
solution5
0 2014-02-20 19:13:17
I figured it out finally. For whatever reason CHROME was not firing the onchange event!. I restarted chrome and it all of a sudden started working. LAME.
I have had random issues like this in the past where it seems like Chrome suddenly starts caching JS.. /facepalm
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