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# 安装mcrypt

yum install -y php-mcrypt libmcrypt libmcrypt-devel

# 升级bison

cd /var/soft/
wget http://ftp.gnu.org/gnu/bison/bison-2.6.4.tar.gz
tar -xvzf bison-2.6.4.tar.gz 
cd bison-2.6.4
./configure
make && make install

# 升级re2c，解决You will need re2c 0.13.4 or later if you want to regenerate PHP parsers.错误

cd /var/soft/
wget http://sourceforge.net/projects/re2c/files/re2c/0.13.5/re2c-0.13.5.tar.gz/download
tar zxf re2c-0.13.5.tar.gz && cd re2c-0.13.5
./configure
make && make install

编译PHP7

# 创建目录
mkdir -p /var/soft/php7
cd /var/soft/php7
# 下载源代码
git clone http://git.php.net/repository/php-src.git
cd php-src
./buildconf
# 配置参数
./configure --prefix=/usr/local/php7 \
--with-config-file-path=/usr/local/php7/etc \
--with-mcrypt=/usr/include \
--with-mysql=mysqlnd \
--with-mysqli=mysqlnd \
--with-pdo-mysql=mysqlnd \
--with-gd \
--with-iconv \
--with-zlib \
--enable-xml \
--enable-bcmath \
--enable-shmop \
--enable-sysvsem \
--enable-inline-optimization \
--enable-mbregex \
--enable-fpm \
--enable-mbstring \
--enable-ftp \
--enable-gd-native-ttf \
--with-openssl \
--enable-pcntl \
--enable-sockets \
--with-xmlrpc \
--enable-zip \
--enable-soap \
--without-pear \
--with-gettext \
--enable-session \
--with-curl \
--with-jpeg-dir \
--with-freetype-dir \
--enable-opcache
#################################################################################
# 编译安装php时出现 /encodings.c:101: undefined reference to `libiconv_close’ 错误的解决方法
# 在装php时出现以下的错误：
# /root/Downloads/php-5.6.5/ext/xmlrpc/libxmlrpc/encodings.c:73: undefined reference to `libiconv_open'
# /root/Downloads/php-5.6.5/ext/xmlrpc/libxmlrpc/encodings.c:81: undefined reference to `libiconv'
# /root/Downloads/php-5.6.5/ext/xmlrpc/libxmlrpc/encodings.c:101: undefined reference to `libiconv_close'
# /root/Downloads/php-5.6.5/ext/xmlrpc/libxmlrpc/encodings.c:101: undefined reference to `libiconv_close'
# collect2: error: ld returned 1 exit status
# make: *** [sapi/cli/php] Error 1
# 根据php官网描述这是一个bug（https://bugs.php.net/bug.php?id=52611）。在configure以后要手动修改下Makefile文件，找到EXTRA_LIBS 在最后添加 -liconv 即可顺利通过
# （大约在Makefile文件的104）
# EXTRA_LIBS = -lcrypt -lz -lresolv -lcrypt -lrt -lmysqlclient -lmcrypt -lltdl -lpng -lz -ljpeg -lcurl -lz -lrt -lm -ldl -lnsl -lxml2 -lz -lm -ldl -lssl -lcrypto -lcurl -lxml2 -lz -lm -ldl -lfreetype -lmysqlclient -lz -lm -lssl -lcrypto -ldl -lxml2 -lz -lm -ldl -lxml2 -lz -lm -ldl -lcrypt -lxml2 -lz -lm -ldl -lxml2 -lz -lm -ldl -lxml2 -lz -lm -ldl -lxml2 -lz -lm -ldl -lssl -lcrypto -lcrypt -liconv
#################################################################################
# 编译安装
make && sudo make install

# 配置

cp php.ini-production /usr/local/php7/etc/php.ini
cp sapi/fpm/init.d.php-fpm /etc/init.d/php7-fpm
chmod +x /etc/init.d/php7-fpm
cp /usr/local/php7/etc/php-fpm.conf.default /usr/local/php7/etc/php-fpm.conf
cp /usr/local/php7/etc/php-fpm.d/www.conf.default /usr/local/php7/etc/php-fpm.d/www.conf

# 配置opcache

vim /usr/local/php7/etc/php.ini
# 加入
zend_extension=/usr/local/php7/lib/php/extensions/no-debug-non-zts-20141001/opcache.so
# 启动
/etc/init.d/php7-fpm start

# 查看PHP版本

/usr/local/php7/bin/php -v

结果:

PHP 7.0.0-dev (cli) (built: Mar  3 2015 10:02:26) 
Copyright (c) 1997-2015 The PHP Group
Zend Engine v3.0.0-dev, Copyright (c) 1998-2015 Zend Technologies
    with Zend OPcache v7.0.4-dev, Copyright (c) 1999-2015, by Zend Technologies