$GLOBALS array for wordpress

Question

is there a file where wordpress defines it's $GLOBALS?

i'm just curious as to what wordpress uses it for and for what purpose.

That's all!

Answer 1

I'm not sure if all of these are WordPress globals, but i did a quick grep type search of the WordPress files and tried to extract all the globals i could..

This is a list i compiled for you, that may not be perfect, but should *hopefully* represent alot of the $GLOBALS keys that WordPress uses, it won't account for globised variables that aren't explicitly defined as $GLOBAL, but still have global scope.

$GLOBALS['_menu_item_sort_prop']
$GLOBALS['_wp_sidebars_widgets']
$GLOBALS['blog_id']
$GLOBALS['body_id']
$GLOBALS['comment']
$GLOBALS['comment_depth']
$GLOBALS['content_width']
$GLOBALS['current_site']
$GLOBALS['current_user']
$GLOBALS['custom_background']
$GLOBALS['custom_image_header']
$GLOBALS['debug_bar']
$GLOBALS['editor_styles']
$GLOBALS['is_winIE']
$GLOBALS['link']
$GLOBALS['login_grace_period']
$GLOBALS['month']
$GLOBALS['month_abbrev']
$GLOBALS['more']
$GLOBALS['post']
$GLOBALS['post_type']
$GLOBALS['posts']
$GLOBALS['query_string']
$GLOBALS['request']
$GLOBALS['single']
$GLOBALS['submenu']
$GLOBALS['tab']
$GLOBALS['type']
$GLOBALS['weekday']
$GLOBALS['weekday_abbrev']
$GLOBALS['weekday_initial']
$GLOBALS['wp_admin_bar']
$GLOBALS['wp_filter']
$GLOBALS['wp_object_cache']
$GLOBALS['wp_post_types']
$GLOBALS['wp_query']
$GLOBALS['wp_styles']
$GLOBALS['wp_taxonomies']
$GLOBALS['wp_the_query']
$GLOBALS['wp_version']

If you wanted to get a better idea of everything inside the global array you could run something like the following to get a print out, because the above approach was obviously flawed(globals are defined in more than one way).

add_action( 'shutdown', 'print_them_globals' );

function print_them_globals() {

    ksort( $GLOBALS );
    echo '<ol>';
    echo '<li>'. implode( '</li><li>', array_keys( $GLOBALS ) ) . '</li>';
    echo '</ol>';
}

Which should give you a more comprehensive list of variables in the global scope..

Hope that's helpful.. :)

Answer 2

Unfortunately, no.

Globals definitions are scattered throught the codebase.

There's no documentation for most of them, either.