超实用PHP函数总结整理
1、PHP加密解密
PHP加密和解密函数可以用来加密一些有用的字符串存放在数据库里，并且通过可逆解密字符串，该函数使用了base64和MD5加密和解密。
<span style="color: #008080"> 1</span> <span style="color: #0000ff">function</span> encryptDecry<strong>2本文来源gaodaima#com搞(代@码$网6</strong><pre>搞gaodaima代码
pt($key, $string, $decrypt){ 2 3 if($decrypt){ 4 5 $decrypted = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($key), base64_decode 6 ($string), MCRYPT_MODE_CBC, md5(md5($key))), “12”); 7 8 return $decrypted; 9 10 }else{ 11 12 $encrypted = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key),13 $string, MCRYPT_MODE_CBC, md5(md5($key)))); 14 15 return $encrypted; 16 17 } 18 19 }
使用方法如下：
<span style="color: #008080">1</span> <span style="color: #008000">//</span><span style="color: #008000">以下是将字符串“Helloweba欢迎您”分别加密和解密 </span><span style="color: #008080">2</span> <span style="color: #008080">3</span> <span style="color: #008000">//加密： </span><span style="color: #008080">4</span> <span style="color: #008080">5</span> <span style="color: #0000ff">echo</span> encryptDecrypt('password', 'Helloweba欢迎您',0<span style="color: #000000">); </span><span style="color: #008080">6</span> <span style="color: #008080">7</span> <span style="color: #008000">//</span><span style="color: #008000">解密： </span><span style="color: #008080">8</span> <span style="color: #008080">9</span> <span style="color: #0000ff">echo</span> encryptDecrypt('password', 'z0JAx4qMwcF+db5TNbp/xwdUM84snRsXvvpXuaCa4Bk=',1);
2、PHP生成随机字符串
当我们需要生成一个随机名字，临时密码等字符串时可以用到下面的函数：
<span style="color: #008080"> 1</span> <span style="color: #0000ff">function</span> generateRandomString(<span style="color: #800080">$length</span> = 10<span style="color: #000000">) { </span><span style="color: #008080"> 2</span> <span style="color: #008080"> 3</span> <span style="color: #800080">$characters</span> = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'<span style="color: #000000">; </span><span style="color: #008080"> 4</span> <span style="color: #008080"> 5</span> <span style="color: #800080">$randomString</span> = ''<span style="color: #000000">; </span><span style="color: #008080"> 6</span> <span style="color: #008080"> 7</span> <span style="color: #0000ff">for</span> (<span style="color: #800080">$i</span> = 0; <span style="color: #800080">$i</span> < <span style="color: #800080">$length</span>; <span style="color: #800080">$i</span>++<span style="color: #000000">) { </span><span style="color: #008080"> 8</span> <span style="color: #008080"> 9</span> <span style="color: #800080">$randomString</span> .= <span style="color: #800080">$characters</span>[<span style="color: #008080">rand</span>(0, <span style="color: #008080">strlen</span>(<span style="color: #800080">$characters</span>) - 1<span style="color: #000000">)]; </span><span style="color: #008080">10</span> <span style="color: #008080">11</span> <span style="color: #000000"> } </span><span style="color: #008080">12</span> <span style="color: #008080">13</span> <span style="color: #0000ff">return</span> <span style="color: #800080">$randomString</span><span style="color: #000000">; </span><span style="color: #008080">14</span> <span style="color: #008080">15</span> }
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转载请注明原文链接：超适用PHP函数总结整理
转载请注明原文链接：超适用PHP函数总结整理
