3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo preg_replace('/[^_]\w(__)[^_]\w/i', '.', 'aluno_pobre__casado__novata'); ?>
based on IC5bj
Output for 4.3.0 - 7.2.0
aluno_pob.sa.vata