Manipulating UUIDs

• UUID::isUUID(): Determine whether a string is a valid UUID or not
• UUID::canonical(): Return the canonical form of a UUID string (i.e., no braces, no dashes, all lower-case)
• UUID::iri(): Formats a UUID as an IRI
• UUID::formatted(): Format a UUID in the traditional aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee form
• UUID::parse(): Parse a string containing a UUID and return an array representing its value.
• UUID::unparse(): Constructs a UUID string given an array as returned by UUID::parse()