Centos下Yum安装PHP5.5,5.6
默认的版本太低了，手动安装有一些麻烦，想采用Yum安装的可以使用下面的方案：
* 检查当前安装的PHP包
yum list installed | grep php
如果有安装的PHP包，先删除他们
yum remove php.x86_64 php-cli.x86_64 php-common.x86_64 php-gd.x86_64 php-ldap.x86_64 php-mbstring.x86_64 php-mcrypt.x86_64 php-mysql.x86_64 php-pdo.x86_64
安装webtatic平台
- Centos 5.X
rpm -Uvh http://mirror.webtatic.com/yum/el5/latest.rpm - CentOs 6.x
rpm -Uvh http://mirror.webtatic.com/yum/el6/latest.rpm - CentOs 7.X
rpm -Uvh https://mirror.webtatic.com/yum/el7/epel-release.rpm rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm
如果想删除上面安装的包，重新安装
rpm -qa | grep webstatic
rpm -e 上面搜索到的包即可
基于webtatic安装php
yum install php55w.x86_64 php55w-cli.x86_64 php55w-common.x86_64 php55w-gd.x86_64 php55w-ldap.x86_64 php55w-mbstring.x86_64 php55w-mcrypt.x86_64 php55w-mysql.x86_64 php55w-pdo.x86_64
yum install php56w.x86_64 php56w-cli.x86_64 php56w-common.x86_64 php56w-gd.x86_64 php56w-ldap.x86_64 php56w-mbstring.x86_64 php56w-mcrypt.x86_64 php56w-mysql.x86_64 php56w-pdo.x86_64
注：如果想升级到55w把上面的55w换成56w就可以了。
基于webtatic安装php-fpm
yum install php55w-fpm
注：如果想升级到55w把上面的55w换成56w就可以了。
安装问题
yum -y install libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel libxml2 libxml2-devel mysql pcre-devel
安装libxml2时出现xz compression not available错误
* 输入如下指令删除错误`epel`包
```
yum remove epel-release
```
说明：中间提示时 输入 :`y (yes)`
* 输入如下指令清理缓存
```
rm -rf /var/cache/yum/x86_64/6Server/epel/
```
* 再次执行相关指令即可。
php安装错误 configure: error: Please reinstall the libcurl distribu
yum -y install curl-devel
收集的一些其它源安装遇到的问题
configure: error: xml2-config not found. Please check your libxml2 installation.
yum install libxml2-develconfigure: error: Cannot find OpenSSL’s
yum install openssl-develconfigure: error: Please reinstall the libcurl distribution -easy.h should be in /include/curl/
yum install curl-develconfigure: error: libjpeg.(a|so) not found
yum install libjpeg-develconfigure: error: libpng.(a|so) not found.
yum install libpng-develconfigure: error: libXpm.(a|so) not found.
yum install libXpm-develconfigure: error: freetype.h not found.
yum install freetype-develconfigure: error: utf8_mime2text() has new signature, but U8T_CANONICAL is missing. This should not happen. Check config.log for additional information.
yum install libc-client-develconfigure: error: mcrypt.h not found. Please reinstall libmcrypt.
yum install libmcrypt-develconfigure: error: Please reinstall libmhash – I cannot find mhash.h
yum install mhash-develconfigure: error: Cannot find MySQL header files under /usr.Note that the MySQL client library is not bundled anymore!
yum install mysql-develconfigure: error: Please reinstall ming distribution. libming.(a|so) not found
- temp remove the config for ‘–with-ming=/opt/ming/’
configure: error: Cannot find pspell
yum install pspell-devel
configure: error: cannot find mm library
Download from http://www.ossp.org/pkg/lib/mm/ wget ftp://ftp.ossp.org/pkg/lib/mm/mm-1.4.2.tar.gz Extract it: tar -zxvf mm-1.4.2.tar.gz ./configure make make installconfigure: error: Cannot find libtidy
yum install libtidy-devel yum install libtidy change path at configure: ‘–with-tidy=/usr’configure: error: not found. Please reinstall the expat distribution.
yum install expat-develconfigure: error: xslt-config not found. Please reinstall the libxslt >= 1.1.0 distribution
yum install libxslt-develTips: To uninstall, just enter:
yum remove {package-name}CentOS下yum安装mcrypt错误：No package php-mcrypt available.解决方法
本文为大家讲解的是CentOS下yum安装mcrypt错误：No package php-mcrypt available.解决方法，感兴趣的同学参考下。
错误描述：#yum install libmcrypt libmcrypt-devel mcrypt mhash Setting up Install Process No package php-mcrypt available. Error: Nothing to do我们会看到
centos yum从仓库中根本找不到这几个包。但我不想使用源码编译就想使用yum安装，怎么办？
解决方法：
yum install epel-release //扩展包更新包
yum update //更新yum源
yum install libmcrypt libmcrypt-devel mcrypt mhash 就ok了
其它方法
http://www.shayanderson.com/linux/centos-5-or-centos-6-upgrade-php-to-php-54-or-php-55.htm