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<?php $arr = array(1); $a =& $arr[0]; //$a and $arr[0] are in the same reference set $arr2 = $arr; //not an assignment-by-reference! var_dump($arr2); $arr2[0]++; var_dump($arr2); var_dmp($a); $arr[0]++; var_dump($arr2); var_dump($arr); var_dmp($a);
Output for 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(1) { [0]=> &int(1) } array(1) { [0]=> &int(2) } Fatal error: Uncaught Error: Call to undefined function var_dmp() in /in/NWYmI:10 Stack trace: #0 {main} thrown in /in/NWYmI on line 10
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
array(1) { [0]=> &int(1) } array(1) { [0]=> &int(2) } Fatal error: Call to undefined function var_dmp() in /in/NWYmI on line 10
Process exited with code 255.

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