3v4l.org

run code in 300+ PHP versions simultaneously
<?php $html = '<html>'; $html .= '<form action="login.php" method="post"><input type="hidden" name="ac" value="log"> \n'; $html .= 'Username: <input type="text" name="username" />'; $html .= 'Password: <input type="password" name="password" />'; $html .= '<input type="submit" value="Login" />'; $html .= '</form>'; $html .= '</html>'; ?>
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
preferences:
234.43 ms | 406 KiB | 459 Q