3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo preg_replace('/([^_]\w)(__)([^_]\w)/i', '$1.$3', 'aluno_pobre__casado__novata'); ?>
based on CAl9S
Output for 4.3.0 - 7.2.0
aluno_pobre.casado.novata