3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php readfile($PHP_SELF);
Output for 5.2.9 - 7.3.0rc4
Notice: Undefined variable: PHP_SELF in /in/udalU on line 1 Warning: readfile(): Filename cannot be empty in /in/udalU on line 1
Output for 5.0.4 - 5.2.8
Notice: Undefined variable: PHP_SELF in /in/udalU on line 1
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: PHP_SELF in /in/udalU on line 1