3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = [0]; preg_match('error', 'abc', $arr[1]); var_dump($arr);
Output for 8.4.1 - 8.4.12
Warning: preg_match(): Delimiter must not be alphanumeric, backslash, or NUL byte in /in/37dc5 on line 4 array(2) { [0]=> int(0) [1]=> NULL }
Output for 8.2.0 - 8.2.29, 8.3.0 - 8.3.25
Warning: preg_match(): Delimiter must not be alphanumeric, backslash, or NUL in /in/37dc5 on line 4 array(2) { [0]=> int(0) [1]=> NULL }
Output for 7.1.25 - 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 - 8.1.33
Warning: preg_match(): Delimiter must not be alphanumeric or backslash in /in/37dc5 on line 4 array(2) { [0]=> int(0) [1]=> NULL }
preferences:
137.83 ms | 410 KiB | 5 Q