3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo preg_match("/ a + + /x", "aaaa");
Output for 5.4.41 - 5.4.45, 5.5.10 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
1
Output for 4.3.11 - 5.4.40, 5.5.0 - 5.5.9
Warning: preg_match(): Compilation failed: nothing to repeat at offset 5 in /in/QE4WN on line 2
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: nothing to repeat at offset 5 in /in/QE4WN on line 2