3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo preg_replace('#\n#u','xxxx',$string);
Output for 5.0.4 - 7.1.0
Notice: Undefined variable: string in /in/s5lPi on line 2
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: string in /in/s5lPi on line 2