Online PHP editor | refs for NhDtr

<?php $strings = [ "21-114512", "test12345abcd", "12test123456testing", "123456", "1234", "12345a67890" ]; function extract_numbers($string) { return preg_match_all('/(?<!\d)\d{5,6}(?!\d)/', $string, $match) ? $match[0] : []; } foreach ($strings as $string) { var_export(extract_numbers($string)); echo "\n---\n"; }