3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function test($var) { //$var = 3; $GLOBAL['a']++; echo $var++; debug_zval_dump($var); } $a = 0; debug_zval_dump($a); test($a); debug_zval_dump($a);
Output for 7.0.0 - 7.1.0
int(0) Notice: Undefined variable: GLOBAL in /in/8teeq on line 6 Notice: Undefined index: a in /in/8teeq on line 6 0int(1) int(0)
Output for hhvm-3.12.0
long(0) refcount(1) 0long(1) refcount(1) long(0) refcount(1)
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.3.0 - 5.6.21
long(0) refcount(2) Notice: Undefined variable: GLOBAL in /in/8teeq on line 6 Notice: Undefined index: a in /in/8teeq on line 6 0long(1) refcount(2) long(0) refcount(2)
Output for 5.0.4 - 5.2.17
long(0) refcount(2) Notice: Undefined variable: GLOBAL in /in/8teeq on line 6 Notice: Undefined index: a in /in/8teeq on line 6 0long(1) refcount(2) long(0) refcount(2)
Output for 4.3.0 - 5.0.3
long(0) refcount(2) Notice: Undefined variable: GLOBAL in /in/8teeq on line 6 Notice: Undefined index: a in /in/8teeq on line 6 0long(1) refcount(2) long(0) refcount(2)