is_protected_meta()
Determines whether a meta key is considered protected.
WordPress 3.1.3 Hooks, Functions, Classes and Methods
sanitize_meta()
Sanitizes meta value.
sanitize_mime_type()
Sanitizes a mime type
send_frame_options_header()
Send a HTTP header to limit rendering of pages to same origin iframes.
sanitize_mime_type
Filters a mime type following sanitization.