3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump (class_exists ('Iterator', false));
Output for 5.0.2 - 7.1.0
bool(false)
Output for 5.0.0 - 5.0.1
bool(true)
Output for 4.3.0 - 4.4.9
Warning: Wrong parameter count for class_exists() in /in/C6MUL on line 3 NULL