php算法-二维数组排序

function arraySort($arr, $key, $order=‘asc‘) {
		if (!is_array($arr)) {
			return false;
		}
		
		$tmpArr = [];
		foreach($arr as $k => $v){
			$tmpArr[$k] = $v[$key];
		}
		if($order == ‘desc‘){
			arsort($tmpArr);
		}else{
			asort($tmpArr);
		}
		
		$newArr = [];
		foreach($tmpArr as $k => $v){
			$newArr[$k] = $arr[$k];
		}
		return $newArr;
	}