1、首先把原本的PHP版本删除
# yum remove php*
2、查看一下是否删除
# rpm -q php
删除成功：package php is not installed
3、安装PHP53
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# yum -y install php53*
注意：
php53-odbc64-5.3.3-2.el5.x86_64 from base has depsolving problems
--> php53-odbc64 conflicts with php53-odbc
Error: php53-odbc64 conflicts with php53-odbc
You could try using --skip-broken to work around the problem
You could try running: package-cleanup --problems
package-cleanup --dupes
rpm -Va --nofiles --nodigest
The program package-cleanup is found in the yum-utils package.
# yum -y install php53* --skip-broken
安装成功会最后出现Complete!
4、查看PHP版本
# rpm -q php53
php53-5.3.3-13.el5_8
5、启动PHP与MYSQL
# service httpd start
# service mysqld start