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<?php $_['with'][1] = 'test1'; $_['with'][305] = 'test305'; $_['without'][0] = 'test0'; var_dump($_);
Output for 4.3.0 - 7.1.0
array(2) { ["with"]=> array(2) { [1]=> string(5) "test1" [305]=> string(7) "test305" } ["without"]=> array(1) { [0]=> string(5) "test0" } }