查找源码包的服务器：
http://rpms.famillecollet.com/SRPMS/
下载
（1）yum install yum-priorities -y
（2）yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm
（3）yum install http://rpms.remirepo.net/enterprise/remi-release-6.rpm
（4）yum install yum-utils rpm-build rpmdevtools
增加编译用户
useradd remi
su remi
解包修改并且编译
（1）rpm -ivh php-5.6.23-1.remi.src.rpm 执行rpm安装命令
（2）cd /home/remi/rpmbuild/SPECS 切换目录到cd /home/remi/rpmbuild/SPECS （src.rpm包默认的解压目录）
PS:yum install bzip2-devel curl-devel httpd-devel pam-devel libstdc++-devel openssl-devel sqlite-devel zlib-devel libedit-devel libtool gcc-c++ libtool-ltdl-devel systemtap-sdt-devel libacl-devel krb5-devel libc-client-devel cyrus-sasl-devel openldap-devel postgresql-devel unixODBC-devel libxml2-devel firebird-devel net-snmp-devel libxslt-devel libxml2-devel t1lib-devel gd-devel gmp-devel tokyocabinet-devel libmcrypt-devel libtidy-devel freetds-devel aspell-devel recode-devel libicu-devel enchant-devel gd-devel libicu-devel
安装PHP的依赖
（3）rpmbuild -bp php56.spec 执行rpmbuild会生成源码包
（4）cd /usr/src/redhat/BUILD/php-5.6.23-1 切换到生成的源码包
（5）./configure 编译配置
（6）make 编译
（7）make install 安装
i386软件包可以在任何x86平台下使用，无论是i686还是x86_64的机器；而i686的软件包一般都对cpu进行了优化，具有向后的兼容性，不具有向前的兼容性。
