3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $filename = '868204009700450_config.txt'; $pattern = '/^[0-9]{15}.+$/'; preg_match($pattern, $filename, $matches); print_r($matches);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => 868204009700450_config.txt )