https://blog.csdn.net/iteye_17658/article/details/82675085
base64 加密和解密
<meta charset="utf-8"><?php $str = "http://www.onestopweb.cn";$en=base64_encode($str);$de=base64_decode($en);echo "原型：$str<br>";echo "加密后：$en<br>";echo "解密后：$de<br>";?>效果图：
解决URL传输的问题
<meta charset="utf-8"><?php//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：$str<br>";echo "urlencode加密后：$urlen<br>";echo "urldecode解密后：$urlde<br>";echo "rawurlencode加密后：$rawurlen<br>";echo "rawurldecode解密后：$rawurlde<br>";?>效果图：
有点复杂的加密解密和解决URL传输问题
<meta charset="utf-8"><?php function encrypt($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 "<br>密钥：$key <br> 加密结果：$en <br> 解密结果：";print_r($de);$en2 = rawurlencode(encrypt($data, $key));$de2 = decrypt(rawurldecode($en2), $key);echo "<br>可以进行URL传输的加密：".$en2."<br>";echo "转输后进行解密:";print_r($de2);?>效果图：
