mysql_query makes variable disappear

[FIA2008]

I have the following code:

PHP Code:

class database{
    function config($part){
        $sql    = mysql_query("SELECT ".$part." FROM configuration");
        if($sql){
            echo 'ok';
        }
        else{
            echo 'no sql';
        }
    }
} 


This doens't work for some reason...
As soon as I remove the command mysql_query(); it says that $sql exists...
Does anyone has a solution for this problem?

[mlseim]

I don't understand the problem ...

So, as it is right now, it displays "no sql"?

What is the purpose of the function?

[Dormilich]

there’s no database connection, thus the return value of mysql_query() is false.

if you want to explore OOP, then you should consider using PDO or MySQLi (OOP style) instead of the outdated mysql extension

[Fou-Lu]

We'll need confirmation on the run from the op, add an or die(mysql_error()); to end the mysql query call.
Interestingly enough, the actual resource is global.