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<?php
// SPDX-FileCopyrightText: 2004-2023 Ryan Parman, Sam Sneddon, Ryan McCue
// SPDX-License-Identifier: BSD-3-Clause
declare(strict_types=1);
namespace SimplePie\Cache;
/**
* Interface for creating a cache filename
*/
interface NameFilter
{
/**
* Method to create cache filename with.
*
* The returning name MUST follow the rules for keys in PSR-16.
*
* @link https://www.php-fig.org/psr/psr-16/
*
* The returning name MUST be a string of at least one character
* that uniquely identifies a cached item, MUST only contain the
* characters A-Z, a-z, 0-9, _, and . in any order in UTF-8 encoding
* and MUST not longer then 64 characters. The following characters
* are reserved for future extensions and MUST NOT be used: {}()/\@:
*
* A provided implementing library MAY support additional characters
* and encodings or longer lengths, but MUST support at least that
* minimum.
*
* @param string $name The name for the cache will be most likely an url with query string
*
* @return string the new cache name
*/
public function filter(string $name): string;
}