3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(1,2,3,4); $b = $a; $c = &$a; $b[] = 'f'; $c[] = 'f'; echo 'a='.print_r($a, true)."\n"; echo 'b='.print_r($b, true)."\n"; echo 'c='.print_r($c, true)."\n";
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 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, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
a=Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => f ) b=Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => f ) c=Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => f )

preferences:
192.66 ms | 406 KiB | 343 Q