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PHP加密3DES報(bào)錯(cuò) Call to undefined function: mcrypt_module_open() 的解決方法，mcryptmoduleopen_PHP教程

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發(fā)布： 2016-07-12 08:54:27

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php加密3des報(bào)錯(cuò) call to undefined function: mcrypt_module_open() 的解決方法，mcryptmoduleopen

我也是php新手，通過(guò)w3cschool了解了一下php基本原理之后就開(kāi)寫(xiě)了。但仍是菜鳥(niǎo)。

先不管3DES加密的方法對(duì)不對(duì)，方法都是網(wǎng)上的，在運(yùn)行的時(shí)候報(bào)了個(gè)錯(cuò)，把小弟整死了。找來(lái)找去終于自己摸出了方法。

<?<span>php

</span><span>/*</span><span>*
* 
* PHP版3DES加解密類(lèi)
*
* 可與java的3DES(DESede)加密方式兼容
*
* @Author: Luo Hui (farmer.luo at gmail.com)
*
* @version: V0.1 2008.12.04
*
</span><span>*/</span>


<span>class</span><span> Crypt3Des
{    
    </span><span>public</span> <span>$key</span>    = "01234567890123456789012345678912"<span>;
    </span><span>public</span> <span>$iv</span>    = "23456789"; <span>//</span><span>like java: private static byte[] myIV = { 50, 51, 52, 53, 54, 55, 56, 57 };
    
    //加密</span>
    <span>public</span> <span>function</span> encrypt(<span>$input</span><span>)
    {
        </span><span>$input</span> = <span>$this</span>->padding( <span>$input</span><span> );
        </span><span>$key</span> = <span>base64_decode</span>(<span>$this</span>-><span>key</span><span>);
        </span><span>$td</span> = mcrypt_module_open( MCRYPT_3DES, '', MCRYPT_MODE_CBC, ''<span>);
        </span><span>//</span><span>使用MCRYPT_3DES算法,cbc模式</span>
        mcrypt_generic_init(<span>$td</span>, <span>$key</span>, <span>$this</span>-><span>iv);
        </span><span>//</span><span>初始處理</span>
        <span>$data</span> = mcrypt_generic(<span>$td</span>, <span>$input</span><span>);
        </span><span>//</span><span>加密</span>
        mcrypt_generic_deinit(<span>$td</span><span>);
        </span><span>//</span><span>結(jié)束</span>
        mcrypt_module_close(<span>$td</span><span>);
        </span><span>$data</span> = <span>$this</span>->removeBR(<span>base64_encode</span>(<span>$data</span><span>));
        </span><span>return</span> <span>$data</span><span>;
    }
    
    </span><span>//</span><span>解密</span>
    <span>public</span> <span>function</span> decrypt(<span>$encrypted</span><span>)
    {
        </span><span>$encrypted</span> = <span>base64_decode</span>(<span>$encrypted</span><span>);
        </span><span>$key</span> = <span>base64_decode</span>(<span>$this</span>-><span>key</span><span>);
        </span><span>$td</span> = mcrypt_module_open( MCRYPT_3DES,'',MCRYPT_MODE_CBC,''<span>);
        </span><span>//</span><span>使用MCRYPT_3DES算法,cbc模式</span>
        mcrypt_generic_init(<span>$td</span>, <span>$key</span>, <span>$this</span>-><span>iv);
        </span><span>//</span><span>初始處理</span>
        <span>$decrypted</span> = mdecrypt_generic(<span>$td</span>, <span>$encrypted</span><span>);
        </span><span>//</span><span>解密</span>
        mcrypt_generic_deinit(<span>$td</span><span>);
        </span><span>//</span><span>結(jié)束</span>
        mcrypt_module_close(<span>$td</span><span>);
        </span><span>$decrypted</span> = <span>$this</span>->removePadding(<span>$decrypted</span><span>);
        </span><span>return</span> <span>$decrypted</span><span>;
    }
    
    </span><span>//</span><span>填充密碼，填充至8的倍數(shù)</span>
    <span>public</span> <span>function</span> padding( <span>$str</span><span> )
    {
        </span><span>$len</span> = 8 - <span>strlen</span>( <span>$str</span> ) % 8<span>;
        </span><span>for</span> ( <span>$i</span> = 0; <span>$i</span> < <span>$len</span>; <span>$i</span>++<span> )
        {
            </span><span>$str</span> .= <span>chr</span>( 0<span> );
        }
        </span><span>return</span> <span>$str</span><span> ;
    }
    
    </span><span>//</span><span>刪除填充符</span>
    <span>public</span> <span>function</span> removePadding( <span>$str</span><span> )
    {
        </span><span>$len</span> = <span>strlen</span>( <span>$str</span><span> );
        </span><span>$newstr</span> = ""<span>;
        </span><span>$str</span> = <span>str_split</span>(<span>$str</span><span>);
        </span><span>for</span> (<span>$i</span> = 0; <span>$i</span> < <span>$len</span>; <span>$i</span>++<span> )
        {
            </span><span>if</span> (<span>$str</span>[<span>$i</span>] != <span>chr</span>( 0<span> ))
            {
                </span><span>$newstr</span> .= <span>$str</span>[<span>$i</span><span>];
            }
        }
        </span><span>return</span> <span>$newstr</span><span>;
    }
    
    </span><span>//</span><span>刪除回車(chē)和換行</span>
    <span>public</span> <span>function</span> removeBR( <span>$str</span><span> ) 
    {
        </span><span>$len</span> = <span>strlen</span>( <span>$str</span><span> );
        </span><span>$newstr</span> = ""<span>;
        </span><span>$str</span> = <span>str_split</span>(<span>$str</span><span>);
        </span><span>for</span> (<span>$i</span> = 0; <span>$i</span> < <span>$len</span>; <span>$i</span>++<span> )
        {
            </span><span>if</span> (<span>$str</span>[<span>$i</span>] != '\n' and <span>$str</span>[<span>$i</span>] != '\r'<span>)
            {
                </span><span>$newstr</span> .= <span>$str</span>[<span>$i</span><span>];
            }
        }
    
        </span><span>return</span> <span>$newstr</span><span>;
    }

}

</span><span>//</span><span>test</span>
<span>$input</span> = "1qaz2ws"<span>;
</span><span>echo</span> "plainText:" . <span>$input</span>."<br/>"<span>;
</span><span>$crypt</span> = <span>new</span><span> Crypt3Des();
</span><span>echo</span> "Encode:".<span>$crypt</span>->encrypt(<span>$input</span>)."<br/>"<span>;
</span><span>echo</span> "Decode:".<span>$crypt</span>->decrypt(<span>$crypt</span>->encrypt(<span>$input</span><span>));
</span>?>

登錄后復(fù)制

代碼可以不看，就看里面的一句：$td = mcrypt_module_open( MCRYPT_3DES, '', MCRYPT_MODE_CBC, '');報(bào)錯(cuò)的就是他。

我搜尋了一大堆解決方法，正確的方法應(yīng)該是（僅用于windows系統(tǒng)哦）：

當(dāng)運(yùn)行php的服務(wù)器端缺少libmcrypt.dll時(shí)使用函數(shù)mcrypt_module_open進(jìn)行解密會(huì)出現(xiàn)此錯(cuò)誤。?
在服務(wù)器上做如下設(shè)置可解決。

立即學(xué)習(xí)“PHP免費(fèi)學(xué)習(xí)筆記（深入）”；

到網(wǎng)上下載一個(gè)php的mcrypt模塊安裝包，只需要libmcrypt.dll文件即可（一般官網(wǎng)上下載的，php目錄下已經(jīng)有的）

1.將libmcrypt.dll復(fù)制到system32目錄或php安裝目錄下的extensions目錄下?
2.將libmcrypt.dll復(fù)制到apache安裝目錄的bin目錄下?
3.到windows目錄下找到php.ini文件，打開(kāi)它
4.找到; Directory in which the loadable extensions (modules) reside.?
extension_dir = "./"??如：extension_dir = "D:\php5\ext"
這兩行，要使extension_dir指向的目錄下能找到libmcrypt.dll，或系統(tǒng)path下有l(wèi)ibmcrypt.dll?
5.找到;Windows Extensions 項(xiàng)下面的;extension=php_mcrypt.dll這一行和;extension=php_iconv.dll（我的沒(méi)有，省略了）這兩行,去掉前面的分號(hào)

ps：剛開(kāi)始看網(wǎng)上的解決方法，有的說(shuō)修改php安裝目錄下的php.ini，但是修改后是沒(méi)用的。一定要修改windows目錄下的php.ini！