本文实例讲述了PHP加密解密类。分享给大家供大家参考。具体分析如下:
这段代码支持 数组加密 , 密文有效期, 各种对称加密
其中参数如下:
* @use ption::en($string, $key);
* @param String $string 需要加密的字串
* @param String $skey 密钥
* @param int $expiry 密文有效期, 加密时候有效, 单位 秒,0 为永久有效
* @return String
1. php代码如下:
/* * -工具库-加密解密码 */ class ption { private static $original = array('=', '+', '/'); private static $later = array('O0O0O', 'o0O0o', 'oo00o'); function __construct() { } private static function md5($skey = '') { $skey = $skey ? $skey : 'ui' ; //uicms::_config('security/authkey'); return md5(substr($skey, 0, 16)); } /** * @use ption::en($string, $key); * @param String $string 需要加密的字串 * @param String $skey 密钥 * @param int $expiry 密文有效期, 加密时候有效, 单位 秒,0 为永久有效 * @return String */ static public function en($string = '', $skey = '', $expiry=0) { if( is_array( $string ) ) { $string = json_encode($string); // uicms::json($string, true, 'en'); } $string = str_pad($expiry ? $expiry + TIME : 0, 10, 0).$string; $strArr = str_split(base64_encode($string)); $strCount = count($strArr); $skey = static::md5($skey); foreach (str_split($skey) as $key => $value) { $key < $strCount && $strArr[$key].=$value; } return str_replace(self::$original, self::$later, join('', $strArr)); } /** * @use ption::de($string, $key); * @param String $string 需要解密的字串 * @param String $skey 密钥 * @return String */ static public function de($string = '', $skey = '') { $strArr = str_split(str_replace(self::$later,self::$original,$string),2); $strCount = count($strArr); $skey = static::md5($skey); foreach (str_split($skey) as $key => $value) { $key < $strCount && $strArr[$key][1] === $value && $strArr[$key] = $strArr[$key][0]; } $result = base64_decode(join('', $strArr)); if(substr($result, 0, 10) == 0 || substr($result, 0, 10) - TIME > 0) { return substr($result, 10); } else { return false; } } }
2. 用法如下:
$str['username'] = 'oschina'; $str['pw'] = '123456'; $str['huoxin'] = '!@#$%^&'; echo "string : " . $str . " <br />"; echo "encode : " . ($enstring = ption::en($str)) . '<br />'; echo "decode : " . ption::de($enstring);
希望本文所述对大家的php程序设计有所帮助。

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