3v4l.org

run code in 300+ PHP versions simultaneously
<?php function validName($name) { if (preg_match('/^[-._ ]/', $name)) { return FALSE; } return TRUE; } $names =array('My Name', 'My.Name', 'My_Name', ' My Name', '_My Name', '.My Name'); foreach($names as $name) { var_dump(validname($name)); }
Output for 5.6.38, 7.0.33, 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 - 8.2.19, 8.3.0 - 8.3.7
bool(true) bool(true) bool(true) bool(false) bool(false) bool(false)
preferences:
122.94 ms | 404 KiB | 181 Q