ownForm.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<title>ownForm.php</title>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
</head>
<body>
<?php
if (isset($_REQUEST["userName"])){
$userName = $_REQUEST["userName"];
print "<h1>Hi, $userName</h1>\n";
} else {
print <<<HERE
<form action = ""
method = "post">
<fieldset>
<label>Name</label>
<input type = "text"
name = "userName">
<button type = "submit">
submit
</button>
</fieldset>
</form>
HERE;
} // end if
?>
</body>
</html>