This is the code on index.php then run it on your server
<?php if(isset($_POST['online']))
{
$File = "output.php";
$Handle = fopen($File, 'w');
$Data = $_POST['code'];
fwrite($Handle, $Data);
fclose($Handle);
}
?>
<script type="text/javascript" >
function getOutput()
{
var strURL="output.php";
// var req = getXMLHTTP();
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function()
{
if (xmlhttp.readyState == 4 && xmlhttp.status==200) // only if "OK"
{
//alert('k');
document.getElementById('output').innerHTML=xmlhttp.responseText;
}
/*else {
alert("There was a problem while using XMLHTTP:\n" + xmlhttp.statusText);
}*/
}
xmlhttp.open("GET", strURL, true);
xmlhttp.send(null);
}
</script>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>
<body>
<form id="form1" name="form1" method="post">
<label>
<textarea name="code" rows="10" cols="80" ></textarea>
</label>
<input type="submit" value="Compile" name="online"/>
<input type="button" value="Output" onClick="getOutput()" />
</form>
<div id="output">
</div>
</body>
</html>