https://blog.csdn.net/iteye_17658/article/details/82675085
base64 加密和解密
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<meta charset="utf-8">
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<?php
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$str = "http://www.onestopweb.cn";
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$en=base64_encode($str);
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$de=base64_decode($en);
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echo "原型：$str<br>";
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echo "加密后：$en<br>";
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echo "解密后：$de<br>";
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?>
效果图：
解决URL传输的问题
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<meta charset="utf-8">
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<?php
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//urlencode 将字符串以 URL 编码。
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$str = "http://www.onestopweb.cn";
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$urlen = urlencode($str);
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$urlde = urldecode($urlen);
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//URL传输请使用下面这种
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//rawurlencode 将字符串编码成 URL 专用格式。
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$rawurlen = rawurlencode($str);
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$rawurlde = rawurldecode($rawurlen);
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echo "原型：$str<br>";
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echo "urlencode加密后：$urlen<br>";
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echo "urldecode解密后：$urlde<br>";
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echo "rawurlencode加密后：$rawurlen<br>";
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echo "rawurldecode解密后：$rawurlde<br>";
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?>
效果图：
有点复杂的加密解密和解决URL传输问题
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<meta charset="utf-8">
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<?php
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function encrypt($data, $key) {
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$prep_code = serialize($data);
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$block = mcrypt_get_block_size('des', 'ecb');
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if (($pad = $block - (strlen($prep_code) % $block)) < $block) {
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$prep_code .= str_repeat(chr($pad), $pad);
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}
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$encrypt = mcrypt_encrypt(MCRYPT_DES, $key, $prep_code, MCRYPT_MODE_ECB);
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return base64_encode($encrypt);
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}
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function decrypt($str, $key) {
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$str = base64_decode($str);
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$str = mcrypt_decrypt(MCRYPT_DES, $key, $str, MCRYPT_MODE_ECB);
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$block = mcrypt_get_block_size('des', 'ecb');
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$pad = ord($str[($len = strlen($str)) - 1]);
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if ($pad && $pad < $block && preg_match('/' . chr($pad) . '{' . $pad . '}$/', $str)) {
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$str = substr($str, 0, strlen($str) - $pad);
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}
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return unserialize($str);
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}
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$key = 'login';
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$data = array('id' => 100, 'username' => 'chaoyi', 'password' => '123456');
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$snarr = serialize($data);
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$en = encrypt($data, $key);
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$de = decrypt($en, $key);
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echo "加密原型："; print_r($data);
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echo "<br>密钥：$key <br>
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加密结果：$en <br>
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解密结果：";print_r($de);
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$en2 = rawurlencode(encrypt($data, $key));
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$de2 = decrypt(rawurldecode($en2), $key);
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echo "<br>可以进行URL传输的加密：".$en2."<br>";
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echo "转输后进行解密:";print_r($de2);
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?>
效果图：
