I'm new to PHP programming and I wanted to know that is it possible to handle PHP events as we do in ASP.NET
I mean I've got a img and I want to perform some task on click event of this img.
I know how to do it in ASP.NET but please help me in context of PHP
Thanks, GURU
PHP itself does not handle client-side events. And PHP paradigm slightly differs from ASP.NET where client and server-side scripds bound together in the same page of code. On client-side, use javascript to handle onClick event, and in event-handler code issue AJAX call to your designated PHP page to send back a response.
<script type="text/javascript">
var http = false;
if(navigator.appName == "Microsoft Internet Explorer") {
http = new ActiveXObject("Microsoft.XMLHTTP");
} else {
http = new XMLHttpRequest();
}
function click() {
http.open("GET", "test.php?name=" + document.getElementById("name").value, true);
http.onreadystatechange=function() {
if(http.readyState == 4) {
document.getElementById('foo').innerHTML = http.responseText;
}
}
http.send(null);
}
</script>
name:<input id="name" type="text">
<p><button onclick="click()">Click me</button></p>
<div id="foo">
Hell
</div>
And this is a test.php code:
<?php
function validate($name) {
if($name == '') {
return '';
}
if(strlen($name) < 3) {
return "<span id=\"warn\">Username too short</span>\n";
}
switch($name) {
case 'bob':
case 'jim':
case 'joe':
case 'carol':
return "<span id=\"warn\">Username already taken</span>\n";
}
return "<span id=\"notice\">Username ok!</span>\n";
}
echo validate(trim($_GET['name']));
?>
