3v4l.org

run code in 300+ PHP versions simultaneously
<?php function func () { static $loc = 0; global $globA; global $globB; $globA = $loc; $globB =& $loc; $loc++; } $globA = null; $globB = null; func(); var_dump($globA); var_dump($globB); func(); var_dump($globA); var_dump($globB); func(); var_dump($globA); var_dump($globB); func(); var_dump($globA); var_dump($globB);
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
int(0) NULL int(1) NULL int(2) NULL int(3) NULL
preferences:
60.68 ms | 990 KiB | 4 Q