Laravel在CentOS上获得内部服务器错误（500）

During deploy laravel project on Centos, I have gotten this error.

PHP Fatal error:  Class 'PDO' not found in /var/www/html/<laravel_project_name>/config/database.php on line 16

I have enabled pdo extension with editing php.ini file.

extension=pdo.so
extension=pdo_sqlite.so
extension=pdo_mysql.so
extension=sqlite.so

Please help me to fix this error. Regards.