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<?php
	$a = array(
		'1' => 'one',
		'one' => 'one',
		'2' => 'two'
	);

	var_dump($a);
	var_dump(array_unique($a));

	// RESULTS
	/*

	array
	  1 => string 'one' (length=3)
	  'one' => string 'one' (length=3)
	  2 => string 'two' (length=3)

	array
	  1 => string 'one' (length=3)
	  2 => string 'two' (length=3)

	*/
?>