Cannot connect to mysql database [phpmyadmin]

问题

• to create databases I'm using xampp->phpyadmin,
• I have created a database called "dungeons",

• in my php code Im connecting to MySQL with this code:

  if ($_SERVER["SERVER_ADDR"]=="localhost")
  {
    define("SQL_HOST","localhost");
    define("SQL_DBNAME","dungeons");
    define("SQL_USERNAME",xxx);
    define("SQL_PASSWORD",xxx);
  } else {
    define("SQL_HOST","127.0.0.1");
    define("SQL_DBNAME","dungeons");
    define("SQL_USERNAME", xxx);
    define("SQL_PASSWORD",xxx);
  }
  
  mysql_connect(SQL_HOST, SQL_USERNAME, SQL_PASSWORD) or die("Cannot connect to mySQL: " . mysql_error());
  mysql_select_db(SQL_DBNAME) or die("Cannot connect to the database: ". mysql_error()); 
  

The error message says

Unknown database 'dungeons', when selecting db.

I don't have any idea where the problem is, since the database is made and I have successfully connected to the mysql with the code.

回答1:

The error is correctly saying that the database is not available or not there. First create a new database in phpmyadmin and name it dungeons. After that try your script. Thank you

回答2:

The error message says

Unknown database 'dungeons'

There doesn't exist a database with name "dungeons".

First create a database using

create database dungeons;

来源：https://stackoverflow.com/questions/15449721/cannot-connect-to-mysql-database-phpmyadmin