Using WordPress ‘get_id_from_blogname()’ PHP function
Retrieves a site’s ID given its (subdomain or directory) slug.
Posts
Using WordPress ‘get_post_embed_html()’ PHP function
The `get_post_embed_html()` function in WordPress retrieves the embed code for a specific post
Using WordPress ‘get_post_type_capabilities()’ PHP function
Builds an object with all post type capabilities out of a post type object
Using WordPress ‘get_post_mime_types()’ PHP function
The `get_post_mime_types()` function retrieves the default post mime types in WordPress