php5.6安裝包官方下載鏈接:https://museum.php.net/php5/php-5.6.4.tar.gz
#安裝編譯程序
apt-get install gcc
apt-get install make
apt-get install libxml2
apt-get install libxml++2.6-dev
#創建安裝目錄
mkdir /usr/local/php
mkdir /usr/local/php/5.6
#解壓安裝包
tar xzvf ./php-5.6.4.tar.gz
#進入安裝包目錄
cd php-5.6.4
#生成安裝腳本
./configure --prefix=/usr/local/php/5.6 --with-config-file-path=/usr/local/php/5.6 --enable-fpm --enable-cli
#編譯安裝
make && make install
#複製php.ini
cp php.ini-production /usr/local/php/5.6/php.ini
#複製啓動腳本
cp ./sapi/fpm/init.d.php-fpm /etc/init.d/php5.6-fpm
chmod +x /etc/init.d/php5.6-fpm
#複製生成php-fpm.conf文件
cp /usr/local/php/5.6/etc/php-fpm.conf.default /usr/local/php/5.6/etc/php-fpm.conf
#修改php-fpm.conf
vim /usr/local/php/5.6/etc/php-fpm.conf
#去掉 pid = run/php-fpm.pid 前面的分號
#並在listen = 127.0.0.1:9000後面添加
#listen.allowed_clients = 127.0.0.1
#添加nobody組
groupadd nobody
#啓動Php5.6-fpm
/etc/init.d/php5.6-fpm start
#查看是否已經成功啓動PHP
ps -ef | grep php
#添加系統別名
echo "alias php5.6='/usr/local/php/5.6/bin/php'" >>~/.bashrc