What is the meaning of std Class object ... + array

[eluser]Sire[/eluser]
A common issue I've seen is the reverse of CroNIX's comment, "Creating default object from empty value"

An example where I've seen this is in the WordPress includes, user.php. An example:

Code:

$blog_id = get_current_blog_id();
        $blogs = array();
        $blogs[ $blog_id ]->userblog_id = $blog_id;

The solution is to create the default object first

Code:

$blog_id = get_current_blog_id();
        $blogs = array();
        $blogs[ $blog_id ] = new stdClass();  // this was added
        $blogs[ $blog_id ]->userblog_id = $blog_id;