3v4l.org

run code in 300+ PHP versions simultaneously
<?php function f($var){ // not using references foreach($var as $k => $v){ unset($var[$k]); // shouldn't this unset from a copy?! } } print gettype($GLOBALS); f($GLOBALS); print gettype($GLOBALS);
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
arrayarray
Output for 8.0.0 - 8.0.30
array Warning: Undefined variable $GLOBALS in /in/5XuO4 on line 11 NULL
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
array Notice: Undefined variable: GLOBALS in /in/5XuO4 on line 11 NULL
Output for 7.3.32 - 7.3.33, 7.4.26
arrayNULL
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
array Notice: Undefined variable: GLOBALS in /in/5XuO4 on line 11 NULL
preferences:
201.42 ms | 402 KiB | 315 Q