先去/usr/local目录下，新建php7bak,php8bak两个目录，假设当下默认安装的是php7，则将php8的目录复制到php8bak目录下备用。
shell脚本如下:
#!/bin/bash
path7=/usr/local/php7bak
path8=/usr/local/php8bak
pid=empty
if [ ! -d $path7/php ]; then
echo 'Start converting php7 to php8..'
if [ ! -d $path8/php ]; then
echo 'error:php8 path is not exist';
exit 0;
fi
kill `cat /usr/local/php/var/run/php-fpm.pid`
mv /usr/local/php $path7
mv $path8/php /usr/local
else
echo 'Start converting php8 to php7..'
if [ ! -d $path7/php ]; then
echo 'error:php7 path is not exist';
exit 0;
fi
kill `cat /usr/local/php/var/run/php-fpm.pid`
mv /usr/local/php $path8
mv $path7/php /usr/local
fi
echo 'restart php..'
/etc/init.d/php-fpm start
echo 'finished~'
标签：php,path7,一键,lnmp,echo,usr,php7,local From： https://www.cnblogs.com/cx850116/p/17522724.html