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<?php $arr=array(); $elem=&$arr[12]; echo isset($elem)?"is set":"is not set"; echo "\n"; $elem=array(); $elem[3]="Test"; $elem[2]="prova"; print_r($elem); print_r($arr);
Output for 4.3.0 - 7.1.0
is not set Array ( [3] => Test [2] => prova ) Array ( [12] => Array ( [3] => Test [2] => prova ) )