1.安装依赖文件：
yum -y install gcc gcc-c++ autoconf libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel libxml2 libxml2-devel zlib zlib-devel glibc glibc-devel glib2 glib2-devel bzip2 bzip2-devel ncurses ncurses-devel curl curl-devel e2fsprogs e2fsprogs-devel krb5 krb5-devel libidn libidn-devel openssl openssl-devel openldap openldap-devel nss_ldap openldap-clients openldap-servers gd gd2 gd-devel gd2-devel perl-CPAN pcre-devel
2.下载php源代码：
wget http://us3.php.net/get/php-5.5.20.tar.gz/from/cn2.php.net/mirror
tar -xvf php-5.5.20.tar.gz
cd php-5.5.20
3.错误案例：configure: error: mcrypt.h not found. Please reinstall libmcrypt
wget ftp://mcrypt.hellug.gr/pub/crypto/mcrypt/attic/libmcrypt/libmcrypt-2.5.7.tar.gz
tar -zxvf libmcrypt-2.5.7.tar.gz cd libmcrypt-2.5.7
./configure prefix=/usr/local/libmcrypt/
4.编译安装：
./configure --prefix=/usr/local/php --with-config-file-path=/etc/php --enable-fpm --enable-pcntl --enable-mysqlnd --enable-opcache --enable-sockets --enable-sysvmsg --enable-sysvsem --enable-sysvshm --enable-shmop --enable-zip --enable-ftp --enable-soap --enable-xml --enable-mbstring --disable-rpath --disable-debug --disable-fileinfo --with-mysql=mysqlnd --with-mysqli=mysqlnd --with-pdo-mysql=mysqlnd --with-pcre-regex --with-iconv --with-zlib --with-mcrypt --with-gd --with-openssl --with-mhash --with-xmlrpc --with-curl --with-imap-ssl
make
make install
cp php.ini-development /etc/php/
5.添加环境变量：
vi /etc/profile
PATH=/usr/local/php/bin:$PATH
export PATH(末尾添加)