解压并编译安装

cd ~/desktop
wget https://pecl.php.net/get/ssh2-1.3.1.tgz
tar -zcvf ssh2-1.3.1.tgz && cd ssh2-1.3.1/ssh2-1.3.1
phpize
./configure
make && make install

php.ini中添加扩展

vim /usr/local/etc/php/7.4/php.ini

找个合适位置添加extension="ssh2.so"

查看扩展是否生效

php -m

里面有ssh2就OK了