WPDB

What are you trying to query?

While wpdb may be useful, if you are querying posts you might look at the template tag, query_posts(), or get_posts().

nope just a normal query
when i use this

<?php
    $wpdb = $wpdb->get_results('SELECT * FROM costume_table');
?>

this will produce this error

Fatal error: using a property of a non-object;

how ever if i do this

<?php
    $wpdb = new wpdb('user','password','database','host');
    $wpdb = $wpdb->get_results('SELECT * FROM costume_table');
?>

and that is the problem i have to include the new class in every new page i make, i thought the class was included within wordpress, putting mysql info in every page does not sound safe. :S

If you put the database tables you are accessing in the save database as the rest of WordPress tables you should be able to access them with the wpdb class.

yeah the problem is not accessing the database, is running the code.
the code wont run unless i create an instance of the class in every page i want to use the wpdb class.

as i explained before, in the documentation it says that automatically wordpress enable this functionally. but even if i try to use one example provided by wordpress i get this error.

this the code wordpress provides

<?php
$name = $wpdb->get_var("SELECT name FROM $wpdb->terms WHERE term_ID=1");
echo $name;

?>

this is the error it produces
Fatal error: Call to a member function get_var() on a non-object in C:\sites\wordpress\wp-content\plugins\exec-php\includes\runtime.php(42) : eval()'d code on line 2

well i found another way to do this in every page i create instead of using the new class. by using

global $wpdb;

the code works.

still not sure why in the guide they don’t address this error.

Even though wpdb does refer to making $wpdb global, can you recommend a better method of explaining that?

Thanks for your recommendations.