/**
* Function to validate a generated GUID / UUID
* @param string $guid GUID
* @return bool
*/
function validGUID($guid){
return preg_match('#^[a-z0-9]{8}-[a-z0-9]{4}-[a-z0-9]{4}-[a-z0-9]{4}-[a-z0-9]{12}$#', $guid);
}
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