3v4l.org

run code in 300+ PHP versions simultaneously
<?php $cpf = 12345678912; if(is_numeric($cpf) && strlen($cpf) == 11) { $block1 = substr($cpf, 0, 3); $block2 = substr($cpf, 3, 3); $block3 = substr($cpf, 6, 3); $block4 = substr($cpf, 9); echo "$block1.$block2.$block3-$block4"; }
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
123.456.789-12
preferences:
183.76 ms | 404 KiB | 243 Q