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<?php $foo = ['foo' => 'bar', 'bar', 'red']; $bar = ['foo' => 'foo', 'bar' => 'bar', 'green' => 'green']; var_dump(array_intersect_key($foo, $bar)); var_dump(array_keys($foo));
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { ["foo"]=> string(3) "bar" } array(3) { [0]=> string(3) "foo" [1]=> int(0) [2]=> int(1) }

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