3v4l.org

run code in 300+ PHP versions simultaneously
<?php preg_replace('~(?>[\pZ\pC]+)$~u', '', str_repeat("\u{2029}", 20000) . 'x');
Output for 5.6.0 - 5.6.25, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.18, 7.3.20 - 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
Output for 7.3.19

Process exited with code 137.
preferences:
105.99 ms | 1484 KiB | 4 Q