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(): Unknown modifier '/' in /in/0IXR8 on line 3
Output for hhvm-3.12.0
Warning: Unknown modifier '/': [/ {2}/m/] in /in/0IXR8 on line 3
Output for hhvm-3.10.0
Warning: Unknown modifier '/': [/ {2}/m/] in /in/0IXR8 on line 8
Output for 4.3.0 - 4.3.10
Warning: Unknown modifier '/' in /in/0IXR8 on line 3