3v4l.org

run code in 300+ PHP versions simultaneously
<?php $_content = '<div><div><iframe width="1280" height="720" src="//www.youtube.com/embed/NKvxWMsGW9E?rel=0" frameborder="0" allowfullscreen></iframe></div></div><div>this div is ok</div>'; preg_match('#(?:<(?:div|span)[^>]*>[\s]*)*(<iframe[\s]*(?:[^>]+)>[\s]*<\/iframe[^>]*>)(?:[\s]*<(?:embed|script)[^>]*>[^<]*<\/(?:embed|script)[^>]*>[\s]*)*(?:<\/(?:div|span)[^>]*>)*#iu', $_content, $matches); //echo $_content; var_dump($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 - 5.6.40, 7.0.0 - 7.0.33, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array(2) { [0]=> string(145) "<div><div><iframe width="1280" height="720" src="//www.youtube.com/embed/NKvxWMsGW9E?rel=0" frameborder="0" allowfullscreen></iframe></div></div>" [1]=> string(123) "<iframe width="1280" height="720" src="//www.youtube.com/embed/NKvxWMsGW9E?rel=0" frameborder="0" allowfullscreen></iframe>" }

preferences:
322.93 ms | 406 KiB | 455 Q