PHP的学习--PHP加密，PHP学习--PHP加密_PHP教程

<span>$password</span> = '123456'<span>;
</span><span>echo</span> <span>md5</span>(<span>$password</span>);

<span>$password</span> = '123456'<span>;
</span><span>$salt</span> = "test";<span>//</span><span> 只取前两个</span>
<span>echo</span> <span>crypt</span>(<span>$password</span>, <span>$salt</span>);

<span>$password</span> = <span>crypt</span>('mypassword'); <span>//</span><span> 自动生成盐值</span>

<span>/*</span><span> 你应当使用 crypt() 得到的完整结果作为盐值进行密码校验，以此来避免使用不同散列算法导致的问题。（如上所述，基于标准 DES 算法的密码散列使用 2 字符盐值，但是基于 MD5 算法的散列使用 12 个字符盐值。）</span><span>*/</span>
<span>if</span> (<span>crypt</span>('mypassword', <span>$password</span>) == <span>$password</span><span>) {
   </span><span>echo</span> "Password verified!"<span>;
}</span>

<span>if</span> (CRYPT_STD_DES == 1<span>) {
    </span><span>echo</span> 'Standard DES: ' . <span>crypt</span>('rasmuslerdorf', 'rl') . "\n"<span>;
}

</span><span>if</span> (CRYPT_EXT_DES == 1<span>) {
    </span><span>echo</span> 'Extended DES: ' . <span>crypt</span>('rasmuslerdorf', '_J9..rasm') . "\n"<span>;
}

</span><span>if</span> (CRYPT_MD5 == 1<span>) {
    </span><span>echo</span> 'MD5:          ' . <span>crypt</span>('rasmuslerdorf', '$1$rasmusle$') . "\n"<span>;
}

</span><span>if</span> (CRYPT_BLOWFISH == 1<span>) {
    </span><span>echo</span> 'Blowfish:     ' . <span>crypt</span>('rasmuslerdorf', '$2a$07$usesomesillystringforsalt$') . "\n"<span>;
}

</span><span>if</span> (CRYPT_SHA256 == 1<span>) {
    </span><span>echo</span> 'SHA-256:      ' . <span>crypt</span>('rasmuslerdorf', '$5$rounds=5000$usesomesillystringforsalt$') . "\n"<span>;
}

</span><span>if</span> (CRYPT_SHA512 == 1<span>) {
    </span><span>echo</span> 'SHA-512:      ' . <span>crypt</span>('rasmuslerdorf', '$6$rounds=5000$usesomesillystringforsalt$') . "\n"<span>;
}</span>

<span>Standard DES: rl.3StKT.4T8M
Extended DES: _J9..rasmBYk8r9AiWNc
MD5:          $</span><span>1</span><span>$rasmusle$rISCgZzpwk3UhDidwXvin0
Blowfish:     $2a$</span><span>07</span>$usesomesillystringfore2uDLvp1Ii2e./<span>U9C8sBjqp8I90dH6hi
SHA</span>-<span>256</span>:      $<span>5</span>$rounds=<span>5000</span>$usesomesillystri$KqJWpanXZHKq2BOB43TSaYhEWsQ1Lr5QNyPCDH/Tp.<span>6</span><span>
SHA</span>-<span>512</span>:      $<span>6</span>$rounds=<span>5000</span>$usesomesillystri$D4IrlXatmP7rx3P3InaxBeoomnAihCKRVQP22JZ6EY47Wc6BkroIuUUBOov1i.S5KPgErtP/EN5mcO.ChWQW21

<span>$password</span> = '123456'<span>;
</span><span>echo</span> <span>sha1</span>(<span>$password</span>);

<span>$url</span> = 'http://www.cnblogs.com/CraryPrimitiveMan/'<span>;
</span><span>$encodeUrl</span> = <span>urlencode</span>(<span>$url</span><span>);
</span><span>echo</span> <span>$encodeUrl</span> . "\n";<span>//</span><span> 如果是在网页上展示的，就将\n修改为<br/></span>
<span>echo</span> <span>urldecode</span>(<span>$encodeUrl</span>);

http%3A%2F%2Fwww.cnblogs.com%2FCraryPrimitiveMan%<span>2F
http</span>:<span>//</span><span>www.cnblogs.com/CraryPrimitiveMan/</span>

<span>function</span> myUrlEncode(<span>$string</span><span>) {
    </span><span>$entities</span> = <span>array</span>('%21', '%2A', '%27', '%28', '%29', '%3B', '%3A', '%40', '%26', '%3D', '%2B', '%24', '%2C', '%2F', '%3F', '%25', '%23', '%5B', '%5D'<span>);
    </span><span>$replacements</span> = <span>array</span>('!', '*', "'", "(", ")", ";", ":", "@", "&", "=", "+", "$", ",", "/", "?", "%", "#", "[", "]"<span>);
    </span><span>return</span> <span>str_replace</span>(<span>$entities</span>, <span>$replacements</span>, <span>urlencode</span>(<span>$string</span><span>));
}</span>

<span>$name</span> = 'CraryPrimitiveMan'<span>;
</span><span>$encodeName</span> = <span>base64_encode</span>(<span>$name</span><span>);
</span><span>echo</span> <span>$encodeName</span> . "\n"<span>;
</span><span>echo</span> <span>base64_decode</span>(<span>$encodeName</span>);

Q3JhcnlQcmltaXRpdmVNYW4=<span>
CraryPrimitiveMan</span>

<?<span>php
</span><span>//</span><span> Include phpass 库</span>
<span>require_once</span>('phpass-03/PasswordHash.php'<span>)

</span><span>//</span><span> 初始化散列器为不可移植(这样更安全)</span>
<span>$hasher</span> = <span>new</span> PasswordHash(8, <span>false</span><span>);

</span><span>//</span><span> 计算密码的哈希值。$hashedPassword 是一个长度为 60 个字符的字符串.</span>
<span>$hashedPassword</span> = <span>$hasher</span>->HashPassword('my super cool password'<span>);

</span><span>//</span><span> 你现在可以安全地将 $hashedPassword 保存到数据库中!

// 通过比较用户输入内容（产生的哈希值）和我们之前计算出的哈希值，来判断用户是否输入了正确的密码</span>
<span>$hasher</span>->CheckPassword('the wrong password', <span>$hashedPassword</span>);  <span>//</span><span> false</span>

<span>$hasher</span>->CheckPassword('my super cool password', <span>$hashedPassword</span>);  <span>//</span><span> true</span>
?>