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How do you call a PHP function from an onchange equals in an HTML form?
Drogers5
You would have to do this using an AJAX request. The onchange event would trigger a Javascript function that would in turn send a request to the server, and handle the response.
This requires a fair bit of back-end code for handling the AJAX, and I would recommend using an existing library for that purpose. jQuery is the one that I am familiar with, and you could handle that change event like so:
<?php
if(array_key_exists('mytext', $_POST)){
echo "The text you posted is "{$_POST['mytext']}"";
exit;
}
?>
<script src="(jquery source URL here)" type="text/javascript"></script>
<!-- ... -->
<input type="text" id="mytext"></input>
<div id="result"></div>
<script type="text/javascript">
$("#mytext").change(function(){
$.post("myscript.php", {'mytext':$("#mytext").val()}, function(dat){
$("#result").HTML(dat);
});
});
</script>
Wiki User
∙ 12y ago
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