phpcms 遍历子栏目

<?php
// 假设 $categorys 是从数据库获取的所有栏目信息
$categories = [
    ['id' => 1, 'name' => '栏目1', 'parentid' => 0],
    ['id' => 2, 'name' => '子栏目1', 'parentid' => 1],
    ['id' => 3, 'name' => '子栏目2', 'parentid' => 1],
    ['id' => 4, 'name' => '栏目2', 'parentid' => 0],
];

function getSubCategories($categories, $parentid = 0) {
    $subCategories = [];
    foreach ($categories as $category) {
        if ($category['parentid'] == $parentid) {
            $subCategories[] = [
                'id' => $category['id'],
                'name' => $category['name'],
                'children' => getSubCategories($categories, $category['id'])
            ];
        }
    }
    return $subCategories;
}

$subCategories = getSubCategories($categories);
print_r($subCategories);
?>