3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo preg_replace('/#(?!\d+)\w+/iu', '<a href="#">$0</a>', '#11 #f1 #1f #ff ddd #22aa c #0');
Output for 4.3.0 - 7.2.0
#11 <a href="#">#f1</a> #1f <a href="#">#ff</a> ddd #22aa c #0