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<?php $a = array('1', 2 ,3 => '3', '4' => 4); $b = array('a', 'b' => 'b'); $v1 = &$a; $v2 = &$a; var_dump($v1); var_dump($v2); $a[3] = 10; $v1 =& $b; var_dump($v1); var_dump($v2); $b['a'] = 'A'; var_dump($v1); var_dump($v2);
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 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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(4) { [0]=> string(1) "1" [1]=> int(2) [3]=> string(1) "3" [4]=> int(4) } array(4) { [0]=> string(1) "1" [1]=> int(2) [3]=> string(1) "3" [4]=> int(4) } array(2) { [0]=> string(1) "a" ["b"]=> string(1) "b" } array(4) { [0]=> string(1) "1" [1]=> int(2) [3]=> int(10) [4]=> int(4) } array(3) { [0]=> string(1) "a" ["b"]=> string(1) "b" ["a"]=> string(1) "A" } array(4) { [0]=> string(1) "1" [1]=> int(2) [3]=> int(10) [4]=> int(4) }

preferences:
350.83 ms | 407 KiB | 459 Q