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<?php $foo = new SplDoublyLinkedList(); $foo->push('A'); $foo->push('B'); var_dump($foo->key()); var_dump(key($foo));
Output for git.master, git.master_jit, rfc.property-hooks
int(0) Deprecated: key(): Calling key() on an object is deprecated in /in/Cl4mj on line 9 NULL

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