3v4l.org

run code in 300+ PHP versions simultaneously
<?php $cpf = "95670785134"; echo substr($cpf, 0, 3) . '.' . substr($cpf, 3, 3) . '.' . substr($cpf,6,3) . '-' . substr($cpf,-2);

preferences:
53.3 ms | 402 KiB | 5 Q