1，php官网下载php-5.6.33.tar.bz2
2，解压到/usr/local/下
3，进入目录执行：./configure
遇到错误：checking libxml2 install dir... no
checking for xml2-config path...
configure: error: xml2-config not found. please check your libxml2 installation.
解决方法：yum install libxml2-devel
4, ./configure
5, make&&make install
6, 设置环境变量vim /etc/profile
加入
path=$path:/usr/local/php/bin
export path
7，执行source /etc/profile
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