3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo preg_replace('', '', "a \033[0;31mred\033[0m color");
Output for 4.3.11 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_replace(): Empty regular expression in /in/IDHQg on line 2
Output for 4.3.0 - 4.3.10, hhvm-3.10.0 - 3.12.0
Warning: Empty regular expression in /in/IDHQg on line 2