cgi review php source code

<html>
<head><title>CGI review 2 php</title>
</head>
<body>
<h1>Return from PHP</h1>
<?php
$a = $_GET["text1"];
$b = $_GET["num1"];
$c = $_GET["email"];
echo "<p>first data is: $a.</p>";
echo "<p>second data is: $b.</p>";
echo "<p>third data is: $c.</p>";
?>
</body>
</html>