Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /var/www/html/wp-includes/wp-db.php:1573 Stack trace: #0 /var/www/html/wp-includes/wp-db.php(601): wpdb->db_connect() #1 /var/www/html/wp-includes/load.php(404): wpdb->__construct('root', 'r3mysql', 'relay2_com_cn', '192.168.20.12:2...') #2 /var/www/html/wp-settings.php(106): require_wp_db() #3 /var/www/html/wp-config.php(136): require_once('/var/www/html/w...') #4 /var/www/html/wp-load.php(37): require_once('/var/www/html/w...') #5 /var/www/html/wp-blog-header.php(13): require_once('/var/www/html/w...') #6 /var/www/html/index.php(17): require('/var/www/html/w...') #7 {main} thrown in /var/www/html/wp-includes/wp-db.php on line 1573