3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $stream = fopen('php://stdout'); var_dump(posix_isatty($stream));
Output for 4.3.0 - 7.1.0
Warning: fopen() expects at least 2 parameters, 1 given in /in/Y2RHb on line 2 bool(false)