3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php header("X-Foo: Bar\rX-Token: Bar");
Output for 5.3.11 - 5.3.29, 5.4.1 - 7.1.7
Warning: Header may not contain more than a single header, new line detected in /in/bsoNP on line 3
Output for 5.4.0
Warning: Header may not contain more than a single header, new line detected. in /in/bsoNP on line 3
Output for 4.3.0 - 5.3.10