PHP קוד:
<form action="<?= $PHP_SELF ?>" method="post">
Username: <input type="text" name="uname" /><br />
<input type="submit" name="submit" value="add username" /><br />
</form>
<?php
if (isset($_POST['uname'])) $uname = $_POST['uname']; else $uname = "";
if ($uname) {
$sql = mysql_query(" ... ");
} else {
echo("Please enter username to add");
}
?>