一、下载PHP7的最新版源码
PHP官网下载PHP源码 下载地址：http://www.php.net/downloads.php
php7.2.9 下载地址 http://am1.php.net/distributions/php-7.2.9.tar.bz2
二、解压
tar -zxf /tmp/php-7.2.9.tar.gz
三、安装相关依赖库
sudo apt-get update
sudo apt-get install libxml2-dev
#安装gcc
sudo apt-get install build-essential
sudo apt-get install openssl
sudo apt-get install libssl-dev
sudo apt-get install make
sudo apt-get install curl
sudo apt-get install libcurl4-gnutls-dev
sudo apt-get install libjpeg-dev
sudo apt-get install libpng-dev
sudo apt-get install libmcrypt-dev
sudo apt-get install libreadline6 libreadline6-dev
四、编译：（编译参数2个中选择一个，第一段大部分机器即可编译，第二段参数推荐64位x86系统编译）
cd /tmp/php-7.2.9
./configure --prefix=/usr/local/php --with-config-file-path=/usr/local/php/etc --enable-fpm --with-fpm-user=www --with-fpm-group=www --with-mysqli --with-pdo-mysql --with-iconv-dir --with-freetype-dir --with-jpeg-dir --with-png-dir --with-zlib --with-libxml-dir=/usr --enable-xml --disable-rpath --enable-bcmath --enable-shmop --enable-sysvsem --enable-inline-optimization --with-curl --enable-mbregex --enable-mbstring --with-mcrypt --enable-ftp --with-gd --enable-gd-native-ttf --with-openssl --with-mhash --enable-pcntl --enable-sockets --with-xmlrpc --enable-zip --enable-soap --without-pear --with-gettext --disable-fileinfo --enable-maintainer-zts
五、执行make 和 sudo make install 安装
make && sudo make install
六、配置php-fpm
cd /usr/local/php7/etc
cp php-fpm.conf.default php-fpm.conf
cd /usr/local/php7/etc/php-fpm.d
cp www.conf.default www.conf
user = www
group = www
如果www用户不存在，那么先添加www用户
groupadd www
useradd -g www www
七、验证PHP
/usr/local/php7/bin/php -v
八、启动php-fpm
sudo /usr/local/php7/sbin/php-fpm
注释
‘./configure’ ‘–prefix=/usr/local/php’ ‘–with-config-file-path=/etc’ ‘–with-mysql=/usr/local/mysql’ ‘–with-mysqli=/usr/local/mysql/bin/mysql_config’ ‘–with-iconv-dir=/usr/local’ ‘–with-freetype-dir’ ‘–with-jpeg-dir’ ‘–with-png-dir’ ‘–with-zlib’ ‘–with-libxml-dir=/usr’ ‘–enable-xml’ ‘–disable-rpath’ ‘–enable-safe-mode’ ‘–enable-bcmath’ ‘–enable-shmop’ ‘–enable-sysvsem’ ‘–enable-inline-optimization’ ‘–with-curl’ ‘–with-curlwrappers’ ‘–enable-mbregex’ ‘–enable-fpm’ ‘–enable-mbstring’ ‘–with-mcrypt’ ‘–with-gd’ ‘–enable-gd-native-ttf’ ‘–with-openssl’ ‘–with-mhash’ ‘–enable-pcntl’ ‘–enable-sockets’ ‘–with-xmlrpc’ ‘–enable-zip’ ‘–enable-soap’
出现得错误如下：
错误一：
configure: error: xml2-config not found. Please check your libxml2 installation.
而我已经安装过了libxml2,但是还是有这个提示：
解决办法：
sudo apt-get install libxml2-dev
错误二：
configure: error: Please reinstall the BZip2 distribution
而我也已经安装了bzip2，网上找到得解决方案都是需要安装bzip2-dev，可是11.10里面没有这个库。
解决办法：在网上找到bzip2-1.0.5.tar.gz，解压，直接make ,sudo make install.(我使用的该源来自于http://ishare.iask.sina.com.cn/f/9769001.html)
错误三：
configure: error: Please reinstall the libcurl distribution -easy.h should be in /include/curl/
解决办法：
sudo apt-get install libcurl4-gnutls-dev
错误四：
configure: error: jpeglib.h not found.
解决办法：
sudo apt-get install libjpeg-dev
错误五：
configure: error: png.h not found.
解决办法：
sudo apt-get install libpng-dev
错误六：
configure: error: libXpm.(a|so) not found.
解决办法：
sudo apt-get install libxpm-dev
错误七：
configure: error: freetype.h not found.
解决办法：
sudo apt-get install libfreetype6-dev
错误八：
configure: error: Your t1lib distribution is not installed correctly. Please reinstall it.
解决办法：
sudo apt-get install libt1-dev
错误九：
configure: error: mcrypt.h not found. Please reinstall libmcrypt.
解决办法：
sudo apt-get install libmcrypt-dev
错误十：
configure: error: Cannot find MySQL header files under yes.
Note that the MySQL client library is not bundled anymore!
解决办法：
sudo apt-get install libmysql++-dev
错误十一：
configure: error: xslt-config not found. Please reinstall the libxslt >= 1.1.0 distribution
解决办法：
sudo apt-get install libxslt1-dev
可见PHP源码安装之前需要先安装这些依赖，详细可见http://forum.ubuntu.org.cn/viewtopic.php?f=88&t=231159
如上错误都解决之后，再次./config….没有错误之后，
make
sudo make install