PHP判断是几维数组

 public function dimension()
    {
        // 判断数组是几维数组
        $data  = array(
            array("Volvo",100,96),
            array("BMW",60,59),
            array("Toyota",110,100)
        );
        
        $al = array(0);
        function aL($data,&$al,$level=0){
            if(is_array( $data )){
                $level++;
                $al[] = $level;
                foreach($data as $v){
                    aL($v,$al,$level);
                }
            }
        }
        aL($data,$al);
        $num_level = max($al);// $num_level 就是你要获取的数组的维度
    }