3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo preg_replace('/\s+/s', '<$0>', "aa bb\ncc\tddd");
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
aa< >bb< >cc< >ddd