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run code in 150+ php & hhvm versions
Bugs & Features
<?php preg_match("`abc`xJ", 'abc', $m); var_dump($m);
Output for 5.6.28, 7.0.14 - 7.1.0
array(1) { [0]=> string(3) "abc" }
Output for 5.2.0 - 5.6.21, 7.0.0 - 7.0.6
Warning: preg_match(): Unknown modifier 'J' in /in/MWHin on line 3 NULL
Output for hhvm-3.10.0 - 3.12.0
Warning: Unknown modifier 'J': [`abc`xJ] in /in/MWHin on line 3 NULL
Output for 4.3.11 - 5.1.6
Warning: preg_match(): Unknown modifier 'J' in /in/MWHin on line 3 array(0) { }
Output for 4.3.0 - 4.3.10
Warning: Unknown modifier 'J' in /in/MWHin on line 3 array(0) { }