安装报错

环境：
centos6.5+php7+mysql5.7

Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /var/www/wordpress/wp-includes/wp-db.php:1570 Stack trace: #0 /var/www/wordpress/wp-includes/wp-db.php(658): wpdb->db_connect() #1 /var/www/wordpress/wp-includes/load.php(404): wpdb->__construct(‘root’, ‘aXv3g275’, ‘blog-pro’, ‘soilove.cn’) #2 /var/www/wordpress/wp-settings.php(107): require_wp_db() #3 /var/www/wordpress/wp-config.php(96): require_once(‘/var/www/wordpr…’) #4 /var/www/wordpress/wp-load.php(37): require_once(‘/var/www/wordpr…’) #5 /var/www/wordpress/wp-blog-header.php(13): require_once(‘/var/www/wordpr…’) #6 /var/www/wordpress/index.php(17): require(‘/var/www/wordpr…’) #7 {main} thrown in /var/www/wordpress/wp-includes/wp-db.php on line 1570