php实战之使用递归读取商品无限分类

<span>/**
 * [treeCats description]
 *<span> @param</span>  [array]  $arr   [原始未排序的数组]
 *<span> @param</span>  [array]  $limit [第一个元素代表开始递归的parent_id,默认为0，第二个元素代表剔除元素及子元素cat_id，如果没有传值，默认为0]
 *<span> @param</span>  integer $level [函数调用的深度]
 *<span> @return</span> [array]         [排好序的数组]
 */</span><span>public</span><span><span>function</span><span>treeCats</span><span>(<span>$arr</span>,<span>$limit</span>,<span>$level</span>=<span>0</span>)</span>{</span><span>$rec</span> = <span>array</span>();
            <span>//先消除cat_id对应的值</span><span>foreach</span> (<span>$arr</span><span>as</span><span>$key</span>=><span>$value</span>){
            <span>if</span>(<span>$value</span>[<span>'cat_id'</span>]!=<span>$limit</span>[<span>'cd'</span>]){
                <span>$arr_new</span> [<span>$key</span>]=<span>$value</span>;
            }

        }
        <span>//对于新数组进行遍历</span><span>foreach</span> (<span>$arr_new</span><span>as</span><span>$key</span> => <span>$value</span>) {
        <span>if</span>(<span>$value</span>[<span>'parent_id'</span>]==<span>$limit</span>[<span>"pd"</span>] &&<span>$value</span>[<span>'parent_id'</span>]!=<span>$limit</span>[<span>"cd"</span>]){
                <span>$value</span>[<span>'level'</span>]=<span>$level</span>;
                <span>$rec</span> []= <span>$value</span>;
                <span>//生成用于下一层循环的数组</span><span>$next_limit</span> = <span>array</span>(<span>"pd"</span>=><span>$value</span>[<span>'cat_id'</span>],<span>"cd"</span>=><span>$limit</span>[<span>"cd"</span>]);

                <span>$rec</span> = array_merge(<span>$rec</span>,<span>$this</span>->treeCats(<span>$arr</span>,<span>$next_limit</span>,<span>$level</span>+<span>1</span>));
            }
        }       
        <span>return</span><span>$rec</span>;
    }