Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /var/www/html/ozkantan/wp-includes/wp-db.php:1643
Stack trace:
#0 /var/www/html/ozkantan/wp-includes/wp-db.php(639): wpdb->db_connect()
#1 /var/www/html/ozkantan/wp-includes/load.php(427): wpdb->__construct('root123', 'root123asd', 'ozkantan', 'db:3306')
#2 /var/www/html/ozkantan/wp-settings.php(120): require_wp_db()
#3 /var/www/html/ozkantan/wp-config.php(90): require_once('/var/www/html/o...')
#4 /var/www/html/ozkantan/wp-load.php(37): require_once('/var/www/html/o...')
#5 /var/www/html/ozkantan/wp-blog-header.php(13): require_once('/var/www/html/o...')
#6 /var/www/html/ozkantan/index.php(17): require('/var/www/html/o...')
#7 {main}
  thrown in /var/www/html/ozkantan/wp-includes/wp-db.php on line 1643