我想在centos5.3上安装php53（之前已经安装了php54，但是删除了），我做了如下。
但是当我尝试最后一件事，它显示以下错误：
Installed: php53.x86_64 0:5.3.3-26.el5_11 Dependency Installed: php53-cli.x86_64 0:5.3.3-26.el5_11 php53-common.x86_64 0:5.3.3-26.el5_11 Complete! [root@QCacti ~]# sudo yum install zabbix-web-mysql Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * epel: ftp.jaist.ac.jp * atomic: mirrors.neusoft.edu.cn * rpmforge: ftp.riken.jp * base: centos.mirror.cdnetworks.com * updates: centos.mirror.cdnetworks.com * extras: centos.mirror.cdnetworks.com * addons: centos.mirror.cdnetworks.com Excluding Packages from CentOS / Red Hat Enterprise Linux 5 - atomicrocketturtle.com Finished Setting up Install Process Parsing package install arguments Resolving Dependencies --> Running transaction check ---> Package zabbix-web-mysql.x86_64 0:2.4.7-1.el5 set to be updated --> Processing Dependency: zabbix-web = 2.4.7-1.el5 for package: zabbix-web-mysql --> Processing Dependency: php-mysql for package: zabbix-web-mysql --> Running transaction check ---> Package zabbix-web.x86_64 0:2.4.7-1.el5 set to be updated --> Processing Dependency: php53-bcmath for package: zabbix-web --> Processing Dependency: php53-gd for package: zabbix-web --> Processing Dependency: php53-mbstring for package: zabbix-web --> Processing Dependency: php53-xml for package: zabbix-web ---> Package php-mysql.x86_64 0:5.1.6-45.el5_11 set to be updated --> Processing Dependency: php-common = 5.1.6-45.el5_11 for package: php-mysql --> Processing Dependency: php-pdo for package: php-mysql --> Running transaction check ---> Package php53-xml.x86_64 0:5.3.3-26.el5_11 set to be updated ---> Package php-common.x86_64 0:5.1.6-45.el5_11 set to be updated ---> Package php-pdo.x86_64 0:5.1.6-45.el5_11 set to be updated ---> Package php53-gd.x86_64 0:5.3.3-26.el5_11 set to be updated ---> Package php53-bcmath.x86_64 0:5.3.3-26.el5_11 set to be updated ---> Package php53-mbstring.x86_64 0:5.3.3-26.el5_11 set to be updated --> Processing Conflict: php53-common conflicts php-common --> Finished Dependency Resolution php53-common-5.3.3-26.el5_11.x86_64 from installed has depsolving problems --> php53-common conflicts with php-common Error: php53-common conflicts with php-common 你确定你正在安装PHP 5.3，不只是PHP？
请尝试遵循本指南，并在安装过程中指定php版本，如：
yum install php53 php53-cli php53-common php53-gd php53-imap php53-intl php53-mbstring php53-mysql php53-odbc php53-pdo php53-pspell php53-snmp php53-xml php53-xmlrpc
另外，在降级之前，你应该删除php54，你曾经使用过的伤心：
rpm -qa | grep -i php yum remove php yum remove php-cli yum remove php-pdo yum remove php-common yum remove <other php packages>
现在你试图安装的zabbix zabbix-web-mysql依赖于php5.4。 它不支持PHP 5.3，但是您可以尝试从RPM包安装而不依赖于：
wget http://repo.zabbix.com/zabbix/2.4/rhel/5/x86_64/zabbix-web-mysql-2.4.7-1.el5.x86_64.rpm wget http://repo.zabbix.com/zabbix/2.4/rhel/5/x86_64/zabbix-web-2.4.7-1.el5.x86_64.rpm rpm -ivh --nodeps zabbix-web-2.4.7-1.el5.x86_64.rpm zabbix-web-mysql-2.4.7-1.el5.x86_64.rpm`
但是我为什么要用5年前应该升级到5.11 CentOS 5.3呢？
你应该考虑在CentOS 7上安装zabbix