3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump(preg_match('/^[0-9]+$/', "123")); var_dump(preg_match('/^[0-9]+$/', "123\n")); var_dump(preg_match('/^[0-9]+$/', "\n123\n")); var_dump(preg_match('/^[0-9]+$/D', "123")); var_dump(preg_match('/^[0-9]+$/D', "123\n")); var_dump(preg_match('/^[0-9]+$/D', "\n123\n")); var_dump(preg_match('/^\d+$/D', "123")); var_dump(preg_match('/^\d+$/D', "123.456")); var_dump(preg_match('/^\d+$/D', "123\n")); var_dump(preg_match('/^\d+$/D', "\n123\n"));
based on 7vnFA
Output for 4.3.0 - 7.2.0
int(1) int(1) int(0) int(1) int(0) int(0) int(1) int(0) int(0) int(0)