3v4l.org

run code in 200+ php & hhvm versions
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<?php $str1 = 'football'; $str2 = 'footboll'; echo strspn($str1 ^ $str2, "\0"); ?>
Output for 4.3.2 - 7.2.0
5
Output for 4.3.0 - 4.3.1

Process exited with code 139.