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Saturday, 29 November 2014

com_create_guid Generate a globally unique identifier

string com_create_guid ( void )
Generate a globally unique identifier (GUID)
Generates a Globally Unique Identifier (GUID).

The phunction PHP framework (http://sourceforge.net/projects/phunction/) uses the following function to generate valid version 4 UUIDs:



<?phpfunction GUID()
{
    if (
function_exists('com_create_guid') === true)
    {
        return
trim(com_create_guid(), '{}');
    }
    return
sprintf('%04X%04X-%04X-%04X-%04X-%04X%04X%04X', mt_rand(0, 65535), mt_rand(0, 65535), mt_rand(0, 65535), mt_rand(16384, 20479), mt_rand(32768, 49151), mt_rand(0, 65535), mt_rand(0, 65535), mt_rand(0, 65535));

}
?>

The output generated by the sprintf() and mt_rand() calls is identical to com_create_guid() results.


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