【解决PHP7中出现的PHP Warning: PHP Startup: Unable to load dynamic library ‘fileinfo.so‘】

#/bin/systemctl restart  php-fpm.service
# php -m
PHP Warning:  PHP Startup: Unable to load dynamic library 'fileinfo.so' (tried: /usr/local/php/lib/php/extensions/no-debug-non-zts-20170718/fileinfo.so (/usr/local/php/lib/php/extensions/no-debug-non-zts-20170718/fileinfo.so: cannot open shared object file: No such file or directory), /usr/local/php/lib/php/extensions/no-debug-non-zts-20170718/fileinfo.so.so (/usr/local/php/lib/php/extensions/no-debug-non-zts-20170718/fileinfo.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'mysql.so' (tried: /usr/local/php/lib/php/extensions/no-debug-non-zts-20170718/mysql.so (/usr/local/php/lib/php/extensions/no-debug-non-zts-20170718/mysql.so: cannot open shared object file: No such file or directory), /usr/local/php/lib/php/extensions/no-debug-non-zts-20170718/mysql.so.so (/usr/local/php/lib/php/extensions/no-debug-n