使用未定义的常量项目/使用未定义的常量数据库

Question

When I submit a variable into a form and submit it to a PHP file which is in turn connected to MySQL server, this happens:

Notice: Use of undefined constant project - assumed 'project' in C:\xampp\htdocs\projectsday\project-phpfile.php on line 3

Notice: Use of undefined constant databse - assumed 'databse' in C:\xampp\htdocs\projectsday\project-phpfile.php on line 3

Why is this so? Last time I tried, it was fine, but it doesn't work only today.

Line 3:

$db=mysql_select_db(project-databse,$con) or die("Failed to connect to MySQL: " . mysql_error());

The 'databse' is not misspelled. Thank you for your help.

Answer 1

The function mysql_select_db expects parameter 1 to be a string (http://php.net/manual/en/function.mysql-select-db.php).

If you haven't defined a string constant named project-databse (it's not possible with -, because the server will try to substract both constants) you should try to put in the name as a string, using ''.

db=mysql_select_db('project-databse',$con) or die("Failed to connect to MySQL: " . mysql_error());