3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo preg_replace('/\\\(?!.*\\)$/', '\Trig\\1', 'asd\qwer\thgsd\Boom');
Output for 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_replace(): Compilation failed: missing closing parenthesis at offset 10 in /in/Edv4Y on line 4
Output for 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
Warning: preg_replace(): Compilation failed: missing ) at offset 10 in /in/Edv4Y on line 4
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: missing ) at offset 10 in /in/Edv4Y on line 4

preferences:
288.83 ms | 401 KiB | 451 Q