本文实例讲述了PHP实现的简单对称加密与解密方法。分享给大家供大家参考，具体如下：
方法一：YII自带的加密方法
/** * 加密 * @var string [要加密的值] */ $secretKey = "wwj"; $data = $res['u_id']; $encryptedData = Yii::$app->getSecurity()->encryptByPassword($data, $secretKey);
/**
* 解密
* @var [type] [加密前的值]
*/
$aid = $req->get('uid');
$secretKey = "wwj";
$uid = Yii::$app->getSecurity()->decryptByPassword($aid,$secretKey);
方法二：
/**
* 安全URL编码
* @param type $data
* @return type
*/
function encode($data) {
return str_replace(array('+', '/', '='), array('-', '_', ''), base64_encode(serialize($data)));
}
/**
* 安全URL解码
* @param type $string
* @return type
*/
function decode($string) {
$data = str_replace(array('-', '_'), array('+', '/'), $string);
$mod4 = strlen($data) % 4;
($mod4) && $data .= substr('====', $mod4);
return unserialize(base64_decode($data));
}
方法三：
/**
* 加密
* @param [type] $code [description]
* @return [type] [description]
*/
public static function encrypt($code)
{
return urlencode(base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5("key"), $code, MCRYPT_MODE_ECB, mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND))));
}
/**
* 解密
* @param [type] $code [description]
* @return [type] [description]
*/
public static function decrypt($code)
{
return urldecode(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5("key"), base64_decode($code), MCRYPT_MODE_ECB, mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND)));
}
方法四：
/**
* 简单对称加密
* @param string $string [需要加密的字符串]
* @param string $skey [加密的key]
* @return [type] [加密后]
*/
function encode($string = '', $skey = 'cxphp')
{
$strArr = str_split(base64_encode($string));
$strCount = count($strArr);
foreach (str_split($skey) as $key => $value)
$key < $strCount && $strArr[$key].=$value;
return str_replace(array('=', '+', '/'), array('O0O0O', 'o000o', 'oo00o'), join('', $strArr));
}
/**
* 简单对称解密
* @param string $string [加密后的值]
* @param string $skey [加密的key]
* @return [type] [加密前的字符串]
*/
function decode($string = '', $skey = 'cxphp')
{
$strArr = str_split(str_replace(array('O0O0O', 'o000o', 'oo00o'), array('=', '+', '/'), $string), 2);
$strCount = count($strArr);
foreach (str_split($skey) as $key => $value)
$key <= $strCount && isset($strArr[$key]) && $strArr[$key][1] === $value && $strArr[$key] = $strArr[$key][0];
return base64_decode(join('', $strArr));
}
以上就是PHP实现的简单对称加密与解密方法
