3v4l.org

run code in 300+ PHP versions simultaneously
<?php $img = array("http://i.stack.imgur.com/52Ha1.png","http://example.com/img.jpg"); foreach ( $img as $v ) { echo $v, @getimagesize($v) ? " = OK \n" : " = Not valid \n"; }
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 - 5.5.36, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.12 - 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 - 8.3.6
http://i.stack.imgur.com/52Ha1.png = Not valid http://example.com/img.jpg = Not valid
preferences:
218.21 ms | 406 KiB | 346 Q