Step One: Download the extensions
Step Two: Extract and enter the relevant directory
1.Install using phpize
2./usr/local/php/bin/phpize If you do not know the location（whereis phpize）
3. ./configure --with-php-config=/usr/local/php/bin/php-config Here,/usr/local/php/bin/php-configis thephp-configpath; this directory is at the same level as phpize.
4. make && make install
Step Three: Findphp.iniconfiguration
1.Appendextension=mcrypt.so,extension=libmcrypt.so
2.Then restartphp-fpm
3. php -m Check the installed extensions
4.The troublesome part was finding the extension download URLs. It made me work overtime!
