3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = ['A', 'B', 'C', 'D']; $b = $a; shuffle($b); die(var_dump($a, $b));
Output for 5.6.22, 7.0.15, 7.2.6
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "D" [1]=> string(1) "B" [2]=> string(1) "A" [3]=> string(1) "C" }
Output for 5.6.20, 5.6.23 - 5.6.24, 7.0.4 - 7.0.5, 7.0.17, 7.2.0
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "B" [1]=> string(1) "A" [2]=> string(1) "D" [3]=> string(1) "C" }
Output for 7.1.10
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "B" [1]=> string(1) "D" [2]=> string(1) "C" [3]=> string(1) "A" }
Output for 5.6.9, 7.1.7
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "C" [1]=> string(1) "B" [2]=> string(1) "A" [3]=> string(1) "D" }
Output for 5.6.7, 5.6.25, 7.1.6
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "D" [3]=> string(1) "C" }
Output for 5.6.4, 7.0.13, 7.0.16, 7.1.5
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "A" [1]=> string(1) "D" [2]=> string(1) "B" [3]=> string(1) "C" }
Output for 7.1.4
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "A" [1]=> string(1) "C" [2]=> string(1) "B" [3]=> string(1) "D" }
Output for 5.6.8, 5.6.17, 7.1.3
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "D" [1]=> string(1) "A" [2]=> string(1) "B" [3]=> string(1) "C" }
Output for 5.6.3, 5.6.11 - 5.6.12, 7.0.3, 7.1.2
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "B" [1]=> string(1) "D" [2]=> string(1) "A" [3]=> string(1) "C" }
Output for 5.6.15, 7.1.1
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "B" [1]=> string(1) "A" [2]=> string(1) "C" [3]=> string(1) "D" }
Output for 7.0.1 - 7.0.2, 7.1.0
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "B" [1]=> string(1) "C" [2]=> string(1) "A" [3]=> string(1) "D" }
Output for 5.6.5, 7.0.20
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "C" [1]=> string(1) "D" [2]=> string(1) "B" [3]=> string(1) "A" }
Output for 5.6.27 - 5.6.28, 7.0.19
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "C" [1]=> string(1) "B" [2]=> string(1) "D" [3]=> string(1) "A" }
Output for 5.6.26, 5.6.30, 7.0.12, 7.0.18
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "C" [1]=> string(1) "D" [2]=> string(1) "A" [3]=> string(1) "B" }
Output for 5.6.6, 5.6.14, hhvm-3.15.4, 7.0.0, 7.0.14
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" }
Output for 5.6.18, 7.0.7, 7.0.11
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "B" [1]=> string(1) "C" [2]=> string(1) "D" [3]=> string(1) "A" }
Output for 5.6.13, 5.6.16, 7.0.6, 7.0.10
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "C" [1]=> string(1) "A" [2]=> string(1) "D" [3]=> string(1) "B" }
Output for 5.6.29, 7.0.9
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "D" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "A" }
Output for 5.6.0, 5.6.2, 5.6.10, 7.0.8
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "A" [1]=> string(1) "C" [2]=> string(1) "D" [3]=> string(1) "B" }
Output for 5.6.1, 5.6.21
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "D" [1]=> string(1) "C" [2]=> string(1) "B" [3]=> string(1) "A" }
Output for 5.6.19
array(4) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" [3]=> string(1) "D" } array(4) { [0]=> string(1) "A" [1]=> string(1) "D" [2]=> string(1) "C" [3]=> string(1) "B" }