3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $where = 'a, b, c, d'; $patterns = "/\b\w(\w*)\b"; echo preg_replace($patterns, $where, '$1'); ?>
Output for 4.3.11 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_replace(): No ending delimiter '/' found in /in/mq1r1 on line 4
Output for hhvm-3.10.0 - 3.12.0
Warning: No ending delimiter '/' found: [/\b\w(\w*)\b] in /in/mq1r1 on line 4
Output for 4.3.0 - 4.3.10
Warning: No ending delimiter '/' found in /in/mq1r1 on line 4