3v4l.org

run code in 150+ php & hhvm versions
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<?php $link = "http://itunes.apple.com/se/app/animoto-video-slideshows/id459248037?mt=8"; preg_match("/id([0-9]*)/", $link, $matches1); var_dump($matches1); preg_match("/id([0-9]+)/", $link, $matches2); var_dump($matches2);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(2) { [0]=> string(2) "id" [1]=> string(0) "" } array(2) { [0]=> string(11) "id459248037" [1]=> string(9) "459248037" }