Untitled

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>iframe Window</title>
    <style>
        body {
            background-color: #D53C2F;
            color: white;
        }
    </style>
</head>
<body>
<?php

  echo "O valor de CAMPO 1 é: ". $_POST["campo1"];

  echo "<br>O valor de CAMPO 2 é: " . $_POST["campo2"];
?>
</body>
</html>