3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function fdopen($id, $mode) { return fopen("/proc/self/fd/".(int)$id, $mode); } echo "php://fd/3";
based on G6PJH
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.6
php://fd/3