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<?php $x = array('12' => 34); var_dump($x); var_dump(gettype(key($x))); var_dump(array_key_exists(true, $x)); var_dump(array_key_exists(12, $x)); var_dump(array_key_exists('12', $x)); var_dump(array_key_exists(12.0, $x));
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { [12]=> int(34) } string(7) "integer" bool(false) bool(true) bool(true) bool(true)

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