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<?php abstract class ArrayBase extends \ArrayObject { } class SpecializedArray extends ArrayBase { } $a = new SpecializedArray; $a->append("a"); var_dump($a); var_dump($a->getArrayCopy()); var_dump(["a"]); var_dump(["a"] == $a->getArrayCopy());

preferences:
127.07 ms | 402 KiB | 5 Q