3v4l.org

run code in 300+ PHP versions simultaneously
<?php $regex = '/(?=xyz\K)/'; $subject = "aaaaxyzaaaa"; // Comment/uncomment below as wanted. // All 3 functions are vulnerable (note, other functions are affected as well) preg_match($regex, $subject, $matches);
Output for 5.4.45, 5.5.29 - 5.5.38, 5.6.13 - 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
Warning: preg_match(): Get subpatterns list failed in /in/9K408 on line 8
Output for 5.4.0 - 5.4.44, 5.5.0 - 5.5.28, 5.6.0 - 5.6.12

Process exited with code 139.
preferences:
263.38 ms | 402 KiB | 375 Q