3v4l.org

run code in 300+ PHP versions simultaneously
<?php $comment = ' <!--this is comment <!--and this as well and end-- of comment is!-->right now-->'; preg_match('/(\<!--\s*.*?((--\>)|$))/im', $comment, $matches); var_dump($matches);
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, 5.5.0 - 5.5.38, 5.6.0 - 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 - 8.3.7
array(4) { [0]=> string(68) "<!--this is comment <!--and this as well and end-- of comment is!-->" [1]=> string(68) "<!--this is comment <!--and this as well and end-- of comment is!-->" [2]=> string(3) "-->" [3]=> string(3) "-->" }
preferences:
317.89 ms | 406 KiB | 398 Q