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com_create_guid

Generate a globally unique identifier (GUID) (PHP 5)
string com_create_guid ( )

Generates a Globally Unique Identifier (GUID) and returns it as a string. A GUID is generated in the same way as DCE UUID's, except that the Microsoft convention is to enclose a GUID in curly braces.

See also uuid_create() in the PECL uuid extension.