php 闭包

php闭包.php

function getCategories(Request $request, Response $response, $args) {
    $categoriesTable = $this - >tableCategory();
    $withBooks = $request - >getParam('withBooks');

    $data = [];

    foreach($categoriesTable - >get() as $num = >$item) {
        $data[$num] = [];
        foreach($item as $key = >$value) $data[$num][$key] = $value;

        // 附加
        $data[$num]['update_at_format'] = date('Y-m-d H:i:s', $item - >update_at);
        $data[$num]['created_at_format'] = date('Y-m-d H:i:s', $item - >created_at);

        // 参数：With Books
        if ( !! $withBooks) {
            // 查询 Book Table
            $data[$num]['books'] = (function($item) {
                if (empty($item - >update_at)) return [];

                $book = $this - >tableBook() - >where(['category_name' = >$item - >name, 'created_at' = >$item - >update_at]);
                if (!$book - >exists()) return [];
                $book = $book - >get() - >first();

                // 处理 Books
                $booksJson = $book - >category_book_data;
                $booksArr = @json_decode($booksJson, true);
                if (json_last_error() !== JSON_ERROR_NONE) return [];

                $booksData = $this - >handleBooks($booksArr);
                return $booksData;
            })($item);
        }
    }

    return $this - >resultTrue($response, '类目数据获取成功', ['categories_total' = >count($data), 'categories' = >$data]);
}