3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $number = '9191919191'; $rest = substr($number, 0,4); $rest2 = substr($number, -1,4); $f = $rest.'-'.$rest2; echo $f;
Output for 4.3.0 - 7.2.0
9191-1