Question

I am testing with MySQL on my home machine using an Apache server under XAMPP with the MySQL settings: Server: localhost via TCP/IP, version 5.5.16.

I have a query: SELECT * FROM project WHERE refno = $refno;

This works perfectly on my test machine. When I try the same thing on my ISP server, which has the following settings: Server: localhost via UNIX socket, version 5.0.92

I get the message:

“supplied argument is not a valid MySQL result resource”

Is the problem the difference in the settings? Is there anything I can do to get it working?

Answer 1

I would recommend you first make absolutely sure you have a valid database connection. Look for mysql_connect in your script, and make sure it is being passed the proper parameters. Look for the code examples on the man page to see how to add die() calls to catch any problems. Using die() is not a practice I would recommend on production code, though. You would usually want to catch and log errors, instead of having the script die.

Once you have made sure your connection returns a ressource, if it still chokes on you make sure you are sending the proper parameter (database name) to mysql_select_db.

Once these forementioned two functions play nice, your query should execute no problem.

Hope that helps, good-luck.