banker/src/KeyValidateTrait.php

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<?php declare(strict_types=1);
/**
* Banker
*
* A Caching library implementing psr/cache (PSR 6) and psr/simple-cache (PSR 16)
*
* PHP version 7.4
*
* @package Banker
* @author Timothy J. Warren <tim@timshomepage.net>
* @copyright 2016 - 2020 Timothy J. Warren
* @license http://www.opensource.org/licenses/mit-license.html MIT License
* @version 3.1.0
* @link https://git.timshomepage.net/timw4mail/banker
*/
namespace Aviat\Banker;
use Aviat\Banker\Exception\InvalidArgumentException;
trait KeyValidateTrait {
/**
* @param $keys
* @param bool $hash
* @throws InvalidArgumentException
*/
protected function validateKeys($keys, bool $hash = FALSE): void
{
// Check type of keys
if ( ! is_iterable($keys))
{
throw new InvalidArgumentException('Keys must be an array or a traversable object');
}
$keys = ($hash) ? array_keys((array)$keys) : (array)$keys;
// Check each key
array_walk($keys, fn($key) => $this->validateKey($key));
}
/**
* @param string $key
* @throws InvalidArgumentException
*/
protected function validateKey($key): void
{
if ( ! is_string($key))
{
throw new InvalidArgumentException('Cache key must be a string.');
}
else if (preg_match("`[{}()/@:\\\]`", $key) === 1)
{
throw new InvalidArgumentException('Invalid characters in cache key');
}
}
}