3v4l.org

run code in 300+ PHP versions simultaneously
<?php $var = "some value"; unset($var); $isnull = is_null($var); $isnull2 = ($var === null); $isset = isset($var); var_dump($var); var_dump($isnull); var_dump($isnull2); var_dump($isset);
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Warning: Undefined variable $var in /in/lUcVV on line 7 Warning: Undefined variable $var in /in/lUcVV on line 8 Warning: Undefined variable $var in /in/lUcVV on line 10 NULL bool(true) bool(true) bool(false)
Output for 7.4.0 - 7.4.33
Notice: Undefined variable: var in /in/lUcVV on line 7 Notice: Undefined variable: var in /in/lUcVV on line 8 Notice: Undefined variable: var in /in/lUcVV on line 10 NULL bool(true) bool(true) bool(false)
preferences:
114.97 ms | 407 KiB | 5 Q