解决办法:mysql_connect()不支持请检查mysql模块是否正确加载_MySQL
故障现象：linux 安装discuz 错误提示:mysql_connect() 不支持请检查mysql模块是否正确加载.
解决办法：查看/usr/lib/php/modules/ (64位的看/usr/lib64/php/modules/)里面根本没有mysql.so
找到centos5.4安装盘，放入光驱，然后找到CentOS目录下的
php-mysql-5.1.6-20.el5.i386.rpm
php-pdo-5.1.6-20.el5.i386.rpm
二个文件，然后通过FTP上传到服务器。
执行安装：
rpm -i php-mysql-5.1.6-20.el5.i386.rpm --nodeps
pm -i php-pdo-5.1.6-20.el5.i386.rpm --nodeps
再查看so文件：
ls /usr/lib/php/modules/
dbase.so ldap.so mysqli.so mysql.so pdo_mysql.so pdo.so pdo_sqlite.so phpcups.so
mysql.so存在了。
然后配置
vi /etc/php.ini找到extension=msql.so，然后在它下方去掉前面分号然后添加如下：
extension=mysql.so
extension=mysqli.so
extension=pdo_MySQL.so
保存，重启httpd
/etc/init.d/httpd restart
刷新网页，mysql已经能连上了。
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