3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function foo() { echo set_error_handler('var_dump'); restore_error_handler(); } set_error_handler('foo'); $a = $b;
Output for 4.3.0 - 5.6.28, 7.0.0 - 7.1.0
Output for hhvm-3.10.0 - 3.12.0
foo