3v4l.org

run code in 300+ PHP versions simultaneously
<?php $tests = array( 'abcdef', 'abc.fff.com', 'bla@mail.com', 'suikoden108', ); foreach ( $tests as $name) var_dump(strtolower(preg_replace('/[^A-Za-z0-9?!]/','', $name)));
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 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
string(6) "abcdef" string(9) "abcfffcom" string(10) "blamailcom" string(11) "suikoden108"
preferences:
227.53 ms | 406 KiB | 356 Q