3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = 'hello, [how] don\'t remove this [are] you'; echo preg_replace('#\ [.+\] #', '', $a);
Output for 4.3.11 - 7.1.0
Warning: preg_replace(): Compilation failed: missing terminating ] for character class at offset 8 in /in/GgUt5 on line 4
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: missing terminating ] for character class at offset 8 in /in/GgUt5 on line 4