在 PHP 递归中查找从第 n 个子级到顶级的所有中间类别

Question

我有类别 table:

Category table:
cat_id      cat_pid     cat_name
    1           0       Women's Fashion
    2           1       Women Accessories
    3           2       Wallets & Cardholders
    4           3       Cases

我的父级类别 ID 为 "Women's Fashion (cat_id = 1)"，叶级类别 ID 为 "Cases (cat_id = 4)"

我想找到 4 到 1 之间的所有类别。

排列如下：

Array(
     [0]=>2
     [1]=>3
)

Answer 1

我不知道你用的是mysqli还是PDO所以我写的是基础代码...

<?php

$cats = [];

function find_parent($parent_id){
    global $cats;
    if ($parent_id > 0){
        $q = mysql_query('SELECT cat_pid FROM Category WHERE cat_id = ' . $parent_id);
        $r = mysql_result($q, 0, 'cat_pid');
        if ($r > 0){
            $cats[] = $parent_id;
            find_parent($r);
        }

    }
}

find_parent(4);
array_shift($cats); //it adds first record too and i think you don't want so removing it here...
print_r($cats);

在 PHP 递归中查找从第 n 个子级到顶级的所有中间类别

Find all middle categories from nth child to top level in PHP recursion

php

mysql

recursion

recursive-query

categories