local.php.example

<?php

if (!isset($config)) {
    $config = [];
}

/*
 ***************************************************
 * Please read config/default.php for all possible
 * configuration items
 * For changes in config/default.php see CHANGELOG.md
 ***************************************************
 */

/*
 * The directory containing calibre's metadata.db file, with sub-directories
 * containing all the formats.
 * BEWARE : it has to end with a /
 */
$config['calibre_directory'] = './';

/*
 * Catalog's title
 */
$config['cops_title_default'] = "COPS";

/*
 * use URL rewriting for downloading of ebook in HTML catalog
 * See README for more information
 *  1 : enable
 *  0 : disable
 * @deprecated 3.1.0 use route urls instead (= always enabled in 3.4+)
 */
$config['cops_use_url_rewriting'] = "0";

/*
 * Set front controller to remove index.php/ from route URLs generated in COPS
 *
 * Note: this assumes your web server config will rewrite /... to /index.php/...
 * - Apache: .htaccess 
 * - Nginx: nginx.conf
 * - PHP built-in: router.php
 * - ...
 *
 * $config['cops_front_controller'] = 'index.php';
 */
$config['cops_front_controller'] = '';

/*
 * Specify the ignored formats that will never display in COPS
 * This will also stop downloading them, unless the files are under the web directory
 */
$config['cops_ignored_formats'] = ['ORIGINAL_EPUB', 'ORIGINAL_AZW3'];

/*
 * Show links to sort by title, author, pubdate, rating or timestamp in OPDS catalog (using facets)
 * Note: this will only work if your e-reader supports facets in OPDS feeds, like Thorium Reader for example
 * See https://specs.opds.io/opds-1.2.html#4-facets for specification details
 * To disable this feature, use an empty array in config/local.php:
 * $config['cops_opds_sort_links'] = [];
 *
 * Available values: ['title', 'author', 'pubdate', 'rating', 'timestamp']
 */
$config['cops_opds_sort_links'] = ['title', 'author', 'pubdate', 'rating', 'timestamp'];

/*
 * Show links to filter by Author, Language, Publisher, Rating, Serie or Tag in OPDS catalog (using facets)
 * Note: this will only work if your e-reader supports facets in OPDS feeds, like Thorium Reader for example
 * See https://specs.opds.io/opds-1.2.html#4-facets for specification details
 * To disable this feature, use an empty array in config/local.php:
 * $config['cops_opds_filter_links'] = [];
 *
 * Available values: ['author', 'language', 'publisher', 'rating', 'series', 'tag']
 */
$config['cops_opds_filter_links'] = ['author', 'language', 'rating', 'tag'];

/*
 * Number of filter links to show per category in OPDS catalog
 */
$config['cops_opds_filter_limit'] = '8';