3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php preg_match("(?<!\\\\)%[^\n]*", "To jest % komentarz\nA to\\% ju┼╝ nie\nA to znowu %tak", $m); print_R($m);
Output for 5.2.0 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_match(): Unknown modifier '%' in /in/ZYjh9 on line 3
Output for hhvm-3.10.0 - 3.12.0
Warning: Unknown modifier '%': [(?<!\\)%[^ ]*] in /in/ZYjh9 on line 3
Output for 4.3.11 - 5.1.6
Warning: preg_match(): Unknown modifier '%' in /in/ZYjh9 on line 3 Array ( )
Output for 4.3.0 - 4.3.10
Warning: Unknown modifier '%' in /in/ZYjh9 on line 3 Array ( )