Is there a file where WordPress defines $GLOBALS?
I’m just curious as to what WordPress uses it for and for what purpose.
That’s all!
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 the list I compiled. It may not be perfect, but should *hopefully* represent a lot of the $GLOBALS keys that WordPress uses It won’t account for globalised 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 since 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>';
}
That should give you a more comprehensive list of variables in the global scope.
Hope that’s helpful. 🙂