3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $code = "$1?1?2/:1$2?3?4?5/:2$3E/:3$8?1?2/:4$5$7E/:5$6$7E/:1$7E/:2$4/"; preg_match_all('~\$\K+~', $code, $matches); print_r($matches[0]);
Output for 5.2.4 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_match_all(): Compilation failed: nothing to repeat at offset 4 in /in/sEB46 on line 3
Output for hhvm-3.12.0
Warning: Compilation failed: nothing to repeat at offset 4 in /in/sEB46 on line 3
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.0 - 4.4.8, 5.0.0 - 5.2.3
Array ( )
Output for 4.4.9
Warning: preg_match_all(): Compilation failed: nothing to repeat at offset 4 in /in/sEB46 on line 3 Notice: Undefined offset: 0 in /in/sEB46 on line 4