3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $m = 'foo'; unset($GLOBALS['m']); var_dump($m);//notice (undefined) //$GLOBALS = array_diff_key($GLOBALS, ['m'=>null]);
Output for 5.0.4 - 5.0.5, 5.1.1 - 5.6.28, 7.0.0 - 7.1.0
Notice: Undefined variable: m in /in/Hlplu on line 4 NULL
Output for hhvm-3.10.0 - 3.12.0
Notice: Undefined variable: m in /in/Hlplu on line 3 NULL
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/Hlplu on line 5
Process exited with code 255.
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: m in /in/Hlplu on line 4 NULL