base64 加密和解密

$str = "http://www.onestopweb.cn";

$en=base64_encode($str);

$de=base64_decode($en);

echo "原型：$str
";

echo "加密后：$en
";

echo "解密后：$de
";

?>

效果图：

解决URL传输的问题

//urlencode 将字符串以 URL 编码。

$str = "http://www.onestopweb.cn";

$urlen = urlencode($str);

$urlde = urldecode($urlen);

//URL传输请使用下面这种

//rawurlencode 将字符串编码成 URL 专用格式。

$rawurlen = rawurlencode($str);

$rawurlde = rawurldecode($rawurlen);

echo "原型：$str
";

echo "urlencode加密后：$urlen
";

echo "urldecode解密后：$urlde
";

echo "rawurlencode加密后：$rawurlen
";

echo "rawurldecode解密后：$rawurlde
";

?>

效果图：

有点复杂的加密解密和解决URL传输问题

function encrypt($data, $key) {

$prep_code = serialize($data);

$block = mcrypt_get_block_size('des', 'ecb');

if (($pad = $block - (strlen($prep_code) % $block)) < $block) {

$prep_code .= str_repeat(chr($pad), $pad);

}

$encrypt = mcrypt_encrypt(MCRYPT_DES, $key, $prep_code, MCRYPT_MODE_ECB);

return base64_encode($encrypt);

}

function decrypt($str, $key) {

$str = base64_decode($str);

$str = mcrypt_decrypt(MCRYPT_DES, $key, $str, MCRYPT_MODE_ECB);

$block = mcrypt_get_block_size('des', 'ecb');

$pad = ord($str[($len = strlen($str)) - 1]);

if ($pad && $pad < $block && preg_match('/' . chr($pad) . '{' . $pad . '}$/', $str)) {

$str = substr($str, 0, strlen($str) - $pad);

}

return unserialize($str);

}

$key = 'login';

$data = array('id' => 100, 'username' => 'chaoyi', 'password' => '123456');

$snarr = serialize($data);

$en = encrypt($data, $key);

$de = decrypt($en, $key);

echo "加密原型："; print_r($data);

echo "
密钥：$key

加密结果：$en

解密结果：";print_r($de);

$en2 = rawurlencode(encrypt($data, $key));

$de2 = decrypt(rawurldecode($en2), $key);

echo "
可以进行URL传输的加密：".$en2."
";

echo "转输后进行解密:";print_r($de2);

?>

效果图：