确认你的linux没有安装mcrypt库,如果已安装,跳过安装步骤

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[root@test-206 ~]# yum list installed|grep mcrypt
libmcrypt.x86_64 2.5.8-4.el5.centos installed
libmcrypt-devel.x86_64 2.5.8-4.el5.centos installed
mcrypt.x86_64 2.6.8-1.el5 installed

以上显示已经安装过,若没有,则按以下两种方式安装

yum命令懒人安装

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yum install libmcrypt libmcrypt-devel mcrypt mhash

执行后会显示即将安装的相关库,你可以根据你的linux限定x86_64或者i386,如yum install libmcrypt.x86_64(如果yum命令无法连接仓库,请检查你的/etc/yum.repos.d/里的文件正确性,以及你的/etc/host是不是可达里面的域名)

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Dependencies Resolved

================================================================================
Package Arch Version Repository Size
================================================================================
Installing:
libmcrypt i386 2.5.7-5.el5 epel 124 k
libmcrypt x86_64 2.5.8-4.el5.centos extras 105 k
libmcrypt-devel i386 2.5.7-5.el5 epel 103 k
libmcrypt-devel x86_64 2.5.8-4.el5.centos extras 10 k
mcrypt x86_64 2.6.8-1.el5 epel 88 k
mhash i386 0.9.2-6.el5 epel 141 k
mhash x86_64 0.9.9-1.el5.rf rpmforge 161 k

Transaction Summary
================================================================================
Install 7 Package(s)
Upgrade 0 Package(s)

Total download size: 731 k
Is this ok [y/N]:

确定安装,最后显示

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Installed:
libmcrypt.x86_64 0:2.5.8-4.el5.centos
libmcrypt-devel.x86_64 0:2.5.8-4.el5.centos
mcrypt.x86_64 0:2.6.8-1.el5
mhash.x86_64 0:0.9.9-1.el5.rf

Complete!

源码编译安装

http://www.sourceforge.net下载Libmcrypt,mhash,mcrypt安装包

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libmcrypt(libmcrypt-2.5.8.tar.gz ):
mcrypt(mcrypt-2.6.8.tar.gz ):
mhash(mhash-0.9.9.9.tar.gz ):

先安装Libmcrypt

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#tar -zxvf libmcrypt-2.5.8.tar.gz
#cd libmcrypt-2.5.8
#./configure
#make
#make install 说明:libmcript默认安装在/usr/local

安装mhash

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#tar -zxvf mhash-0.9.9.9.tar.gz
#cd mhash-0.9.9.9
#./configure
#make
#make install

安装mcrypt

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#tar -zxvf mcrypt-2.6.8.tar.gz
#cd mcrypt-2.6.8
#LD_LIBRARY_PATH=/usr/local/lib ./configure
#make
#make install

最后,还是检查下,是否安装成功

安装php的mcrypt扩展(动态加载编译)

下载php下的mcrypt扩展或者直接下载php的完整安装包

http://cn.php.net/releases/ 网页下找到自己服务器的php版本,下载后tar解压(本人的是php5.3.3)

进入ext/mcrypt文件夹

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[root@*_* 14:45 ~]# cd php-5.3.3/ext/mcrypt/

执行phpize命令(phpize是用来扩展php扩展模块的,通过phpize可以建立php的外挂模块,如果没有?yum install php53-devel里包含了,或者其他方法)

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[root@*_* 14:48 mcrypt]# whereis phpize    //为了确定phpize存在
phpize: /usr/bin/phpize /usr/share/man/man1/phpize.1.gz
[root@*_* 14:48 mcrypt]# phpize
Configuring for:
PHP Api Version: 20090626
Zend Module Api No: 20090626
Zend Extension Api No: 220090626

执行完后,会发现当前目录下多了一些configure文件,最后执行php-config命令就基本完成了

执行以下命令,确保你的/usr/bin/php-config是存在的

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[root@*_* 15:02 mcrypt]# whereis php-config
php-config: /usr/bin/php-config /usr/share/man/man1/php-config.1.gz
[root@*_* 15:02 mcrypt]# ./configure --with-php-config=/usr/bin/php-config

如果遇到以下错误,请先安装gcc,命令yum install gcc

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configure: error: no acceptable C compiler found in $PATH

直到不报错,出现:config.status: creating config.h,执行以下命令

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[root@*_* 15:06 mcrypt]# make && make install

最后的最后,会提示你如下,说明你大功告成了

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Installing shared extensions:     /usr/lib64/php/modules/

顺便检查下/usr/lib64/php/modules/里的mrcypt.so扩展是否已经创建成功

然后的事就简单了,给你的php.ini添加一条extension=mcrypt.so

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[root@*_* 15:09 mcrypt]# cd /etc/php.d

创建一个mrcypt.ini文件就行,里面写extension=mcrypt.so

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[root@*_* 15:17 php.d]# echo 'extension=mcrypt.so' > mcrypt.ini

重启apache,查阅phpinfo,mcrypt模块扩展是不是加载了?