Fatal error: Uncaught PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'article' in 'where clause' in /var/www/html/php/helper/blog.php:49 Stack trace: #0 /var/www/html/php/helper/blog.php(49): PDO->query('SELECT * FROM b...') #1 /var/www/html/php/views/page/article.php(20): BlogHelper::getBlogPostById('article/5') #2 /var/www/html/index.php(93): include('/var/www/html/p...') #3 {main} thrown in /var/www/html/php/helper/blog.php on line 49