3v4l.org

run code in 300+ PHP versions simultaneously
<?php $userinput = "Hello World!!!"; echo '<a href="mycgi?foo=', urlencode($userinput), '">';
Output for 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
<a href="mycgi?foo=Hello+World%21%21%21">
preferences:
104.08 ms | 1520 KiB | 4 Q