linux 系统下安装多个php版本

思路:

　　下载不同的php源码包，解压后安装在不同的目录下，修改php-fpm监听的端口号

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php安装配置参数：

./configure --prefix=/usr/local/php71 --exec-prefix=/usr/local/php71 --bindir=/usr/local/php71/bin --sbindir=/usr/local/php71/sbin --includedir=/usr/local/php71/include --libdir=/usr/local/php71/lib/php --mandir=/usr/local/php71/php/man --with-config-file-path=/usr/local/php71/etc --with-mcrypt=/usr/local/libmcrypt --with-mhash --with-openssl --with-mysqli=/usr/local/mysql/bin/mysql_config --with-pdo-mysql=/usr/local/mysql --with-gd --with-iconv --with-zlib --enable-inline-optimization --disable-debug --disable-rpath --enable-shared --enable-xml --enable-bcmath --enable-shmop --enable-sysvsem --enable-mbregex --enable-mbstring --enable-ftp --enable-gd-native-ttf --enable-pcntl --enable-sockets --with-xmlrpc --enable-soap --without-pear --with-gettext --enable-session --with-curl --with-jpeg-dir --with-freetype-dir --enable-fpm --without-gdbm --disable-fileinfo --enable-opcache=no