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<?php

/*
 * The RandomLib library for securely generating random numbers and strings in PHP
 *
 * @author     Anthony Ferrara <ircmaxell@ircmaxell.com>
 * @copyright  2011 The Authors
 * @license    http://www.opensource.org/licenses/mit-license.html  MIT License
 * @version    Build @@version@@
 */

/**
 * The UniqID Random Number Source
 *
 * This uses the internal `uniqid()` function to generate low strength random
 * numbers.
 *
 * PHP version 5.3
 *
 * @category   PHPCryptLib
 * @package    Random
 * @subpackage Source
 *
 * @author     Anthony Ferrara <ircmaxell@ircmaxell.com>
 * @copyright  2011 The Authors
 * @license    http://www.opensource.org/licenses/mit-license.html  MIT License
 *
 * @version    Build @@version@@
 */
namespace RandomLib\Source;

use SecurityLib\Strength;
use SecurityLib\Util;

/**
 * The UniqID Random Number Source
 *
 * This uses the internal `uniqid()` function to generate low strength random
 * numbers.
 *
 * @category   PHPCryptLib
 * @package    Random
 * @subpackage Source
 *
 * @author     Anthony Ferrara <ircmaxell@ircmaxell.com>
 * @codeCoverageIgnore
 */
class UniqID extends \RandomLib\AbstractSource
{

/**
     * Return an instance of Strength indicating the strength of the source
     *
     * @return \SecurityLib\Strength An instance of one of the strength classes
     */
    public static function getStrength()
    {
        return new Strength(Strength::LOW);
    }

/**
     * Generate a random string of the specified size
     *
     * @param int $size The size of the requested random string
     *
     * @return string A string of the requested size
     */
    public function generate($size)
    {
        $result = '';
        while (Util::safeStrlen($result) < $size) {
            $result = uniqid($result, true);
        }

return Util::safeSubstr($result, 0, $size);
    }
}