3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function test($var) { debug_zval_dump($a); $GLOBALS['a']++; echo $var; } $a = 0; test($a);
Output for 7.0.0 - 7.1.0
Notice: Undefined variable: a in /in/clD9c on line 5 NULL 0
Output for 5.0.4 - 5.6.28
Notice: Undefined variable: a in /in/clD9c on line 5 NULL refcount(1) 0
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: a in /in/clD9c on line 5 NULL refcount(1) 0