- Output for 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 - 8.3.7
- Array ( [1] => Array *RECURSION* [2] => Array *RECURSION* )
<?php
$array = array(1=>"test",2=>"test2");
$array[1]=&$array;
$array[2]=&$array[1];
$array[2]=$array[1];
print_r($array);