我想获取父类别的所有子类别和孙类别,直至任何级别。我的表结构是这样的。
谁能建议我如何获取所有子类别(即手机类别的三星和 S3)。
最佳答案
你需要递归。创建这样的函数(假设您使用事件记录):
function getCategoriesByParentId($category_id) {
$category_data = array();
$category_query = $this->db->query("SELECT * FROM categories WHERE parent_category = '" . (int)$category_id . "'");
foreach ($category_query->result() as $category) {
$category_data[] = array(
'category_id' => $category->category_id,
'category_name' => $category->category_name,
'category_alias' => $category->category_alias,
'parent_category' => $category->parent_category
);
$children = getCategoriesByParentId($category->category_id);
if ($children) {
$category_data = array_merge($children, $category_data);
}
}
return $category_data;
}
并这样调用它:
$all_categories = getCategoriesByParentId(0);
输出将是这样的:
Array
(
[0] => Array
(
[category_id] => 14
[category_name] => s3
[category_alias] => s3
[parent_category] => 13
)
[1] => Array
(
[category_id] => 13
[category_name] => Samsung
[category_alias] => samsung
[parent_category] => 12
)
[2] => Array
(
[category_id] => 12
[category_name] => Phone
[category_alias] => phone
[parent_category] => 0
)
)
有关更多信息,这取自 OpenCart 1.5.4
,catalog\model\catalog\category.php
下的 ModelCatalogCategory
类。
关于php - 如何在 codeigniter 中获取父类别的所有子类别和孙类别?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/23780349/