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run code in 150+ php & hhvm versions
Bugs & Features
<?php $s = "AAA"; preg_match('/A+A/', $s, $m); var_dump($m); preg_match('/A+?A/', $s, $m); var_dump($m); preg_match('/A++A/', $s, $m); var_dump($m);
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
array(1) { [0]=> string(3) "AAA" } array(1) { [0]=> string(2) "AA" } array(0) { }
Output for hhvm-3.10.0

Process exited with code 153.