How To Generate A GUID Using PHP
PHP has the "com_create_guid" function. Since that is a COM function one can assume it leverages internal Window's functionality to obtain a GUID. Obviously this is useful only on IIS. Refresh the page to obtain a new GUID. A User contributed pseudo GUID generator for non-Windows servers can be found here.
What is a GUID? Excerpt from Wikipedia: "A globally unique identifier or GUID is a special type of identifier used in software applications to provide a reference number which is unique in any context (hence, "globally"), for example, in defining the internal reference for a type of access point in a software application, or for creating unique keys in a database. While each generated GUID is not guaranteed to be unique, the total number of unique keys (2128 or 3.4×1038) is so large that the probability of the same number being generated twice is extremely small."
GUIDs are useful in creating anti-CSRF tokens for web applications. Generate A GUID Using ASP.
GUID: {AE575EB0-E11B-4D01-8CC6-17B6BB4099F0}
Simple Use: $guid = com_create_guid(); echo $guid;
