3v4l.org

run code in 300+ PHP versions simultaneously
<?php $url = '\' onerror=\'alert(1)'; echo "<img src='" . htmlentities($url) . "' alt='' />";
Output for 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
<img src='&#039; onerror=&#039;alert(1)' alt='' />
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
<img src='' onerror='alert(1)' alt='' />

preferences:
146.8 ms | 402 KiB | 149 Q