array_merge recursive

gistfile1.aw

class CMap2 {
	/**
	 * Merges two or more arrays into one recursively.
	 * If each array has an element with the same string key value, the latter
	 * will overwrite the former (different from array_merge_recursive).
	 * Recursive merging will be conducted if both arrays have an element of array
	 * type and are having the same key.
	 * For integer-keyed elements, the elements from the latter array will
	 * be appended to the former array.
	 * @param array $a array to be merged to
	 * @param array $b array to be merged from. You can specifiy additional
	 * arrays via third argument, fourth argument etc.
	 * @return array the merged array (the original arrays are not changed.)
	 * @see mergeWith
	 */
	public static function mergeArray($a,$b)
	{
		$args=func_get_args();
		$res=array_shift($args);
		while(!empty($args))
		{
			$next=array_shift($args);
			foreach($next as $k => $v)
			{
				if(is_integer($k))
					isset($res[$k]) ? $res[]=$v : $res[$k]=$v;
				else if(is_array($v) && isset($res[$k]) && is_array($res[$k]))
					$res[$k]=self::mergeArray($res[$k],$v);
				else
					$res[$k]=$v;
			}
		}
		return $res;
	}

}
$a = array(
	'asdf' => array(
		'qqqq' => 'pppp',
		'wwww' => 'oooo',
		'eeee' => 'iiii'
	),
	'default' => 'yes'
);

$b = array(
	'asdf' => array(
		'qqqq' => 'a',
	),
	'default' => 'overwriten'
);


var_dump(array_merge($a, $b));
var_dump(array_merge_recursive($a, $b));
var_dump(CMap2::mergeArray($a, $b));