3v4l.org

run code in 300+ PHP versions simultaneously
<?php if ($foo): ?> <meta property="foo" url="<?= $url; ?>"> <?php else: ?> <p>something else</p> <?php endif; ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: Undefined variable $foo in /in/nFSl7 on line 1 <p>something else</p>
Output for 7.0.0 - 7.0.26, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: foo in /in/nFSl7 on line 1 <p>something else</p>
Output for 7.3.32 - 7.3.33
<p>something else</p>

preferences:
178.03 ms | 401 KiB | 210 Q