3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump($http_response_header); $x = fopen('php://stdin'); var_dump($http_response_header);
Output for 5.0.4 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Undefined variable: http_response_header in /in/C0YQ5 on line 2 NULL Warning: fopen() expects at least 2 parameters, 1 given in /in/C0YQ5 on line 3 Notice: Undefined variable: http_response_header in /in/C0YQ5 on line 4 NULL
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: http_response_header in /in/C0YQ5 on line 2 NULL Warning: fopen() expects at least 2 parameters, 1 given in /in/C0YQ5 on line 3 Notice: Undefined variable: http_response_header in /in/C0YQ5 on line 4 NULL