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<?php $query = array( 'a' => 'b', 'c' => 'd' ); var_dump($query, array('a')); var_dump($query, array('a' => null));
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { ["a"]=> string(1) "b" ["c"]=> string(1) "d" } array(1) { [0]=> string(1) "a" } array(2) { ["a"]=> string(1) "b" ["c"]=> string(1) "d" } array(1) { ["a"]=> NULL }

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