3v4l.org

run code in 300+ PHP versions simultaneously
<?php $s = '<iframe width=800><embed width=300>fdgdfg</embed>sfsdfsdf</iframe>'; $matches = array(); var_dump( preg_match('~width=["\']?(\d+)["\']?~', $s, $matshes) ); var_dump($matshes);
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 - 7.1.25, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
int(1) array(2) { [0]=> string(9) "width=800" [1]=> string(3) "800" }

preferences:
212.64 ms | 405 KiB | 324 Q