Undefined class constant 'MYSQL_ATTR_INIT_COMMAND' with pdo

Question

$db = new PDO(\'mysql:dbname=xnews;host=localhost;port=\' . $LOCAL_DB_PORT, 
          $LOCAL_DB_USER, 
          $LOCAL_DB_PASS, 
          array(PDO::MYSQL_ATTR_IN         


        

Answer 1

For Centos I was missing php-mysql library:

yum install php-mysql

service httpd restart

There is no need to enable any extension in php.ini, it is loaded by default.