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@timwhitlock
Created January 27, 2012 10:48
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What require_wp_db function in Wordpress would look like, if it worked
<?php
function require_wp_db() {
global $wpdb;
if ( isset($wpdb) ){
return;
}
// Should check for override db.php file first
// - including both means fatal error on duplicate class
if ( file_exists( WP_CONTENT_DIR . '/db.php' ) ){
require_once( WP_CONTENT_DIR . '/db.php' );
}
// include core default
else {
require_once( ABSPATH . WPINC . '/wp-db.php' );
}
// The db.php adapter may have defined the global for us
if( ! isset($wpdb) ){
$wpdb = new wpdb( DB_USER, DB_PASSWORD, DB_NAME, DB_HOST );
}
}
@johnbillion
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This patch isn't necessary. Your db.php file shouldn't define the wpdb class, it should define a class that extends it and then instantiate it (unless you want to write a completely new db driver class from scratch, then you don't need to extend wpdb).

Example db.php:

class my_db_driver extends wpdb {

    public function some_method_i_want_to_override() {
        // Hello!
    }

}

$wpdb = new my_db_driver( DB_USER, DB_PASSWORD, DB_NAME, DB_HOST );

@johnbillion
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Sorry, got tripped up by the comment editor there.

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