3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $var = ' Hello World'; //x4 spaces echo preg_replace("^ {2}\/m/","\t",$var);
Output for 4.3.11 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_replace(): No ending delimiter '^' found in /in/LrvOi on line 3
Output for hhvm-3.10.0 - 3.12.0
Warning: No ending delimiter '^' found: [^ {2}\/m/] in /in/LrvOi on line 3
Output for 4.3.0 - 4.3.10
Warning: No ending delimiter '^' found in /in/LrvOi on line 3