Retrieve the current post title for the feed.

Calculated the new dimensions for a downsampled image.

Retrieves user option that can be either per Site or per Network.

Retrieve user metadata.

Retrieve the user’s drafts.

Returns whether the server is running Apache with the mod_rewrite module loaded.

Determines whether the caller is in the Loop.

Determines whether the query is for an existing attachment page.

Determines whether an attachment URI is local and really an attachment.

Determines whether the query is for a post or page preview.