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<?php $arr=array(); $elem=&$arr[12]; $elem=array(); $elem[3]="Test"; $elem[2]="prova"; print_r($elem); print_r($arr);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
Array ( [3] => Test [2] => prova ) Array ( [12] => Array ( [3] => Test [2] => prova ) )