3v4l.org

run code in 300+ PHP versions simultaneously
<?php $A = array(3,4); $B = &$A[0]; $F = &$A[1]; $C = $A; $D = $A; var_dump($C); var_dump($D); $C[0] = $D[1]; $C[0] = 10; $D[1] = 20; var_dump($C); var_dump($D); echo $A[0] . ' ' . $A[1];
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, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 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
array(2) { [0]=> &int(3) [1]=> &int(4) } array(2) { [0]=> &int(3) [1]=> &int(4) } array(2) { [0]=> &int(10) [1]=> &int(20) } array(2) { [0]=> &int(10) [1]=> &int(20) } 10 20
preferences:
192.37 ms | 406 KiB | 327 Q