mysql_connect(): Headers and client library minor version mismatch. Headers:

mysql_connect(): Headers and client library minor version mismatch. Headers:这样的错误是由于高版本的MySQL，低版本的MySQL Client API引起的，我在CentOS 7上安装MySQL-Server的时候出现了这个错误，解决办法：

卸载PHP-mysql

1. yum remove php–mysql –y

安装php-mysqlnd

1. yum install php–mysqlnd –y     ->    yum install php70w-mysqlnd -y

重启httpd

1. systemctl restart httpd.service