function uuid_uuid in Universally Unique IDentifier 6

Generate and return an Universally Unique IDentifier (UUID).

Return value

An UUID, made up of 32 hex digits and 4 hyphens.

See also

http://www.ietf.org/rfc/rfc4122.txt

http://php.net/manual/en/function.uniqid.php#65879

10 calls to uuid_uuid()

UUIDFunctionalityTestCase::testChangedSettingNodeUUID in ./uuid.test

Verify uuid behavior with changed settings. All settings are forced to disabled, then a node is created (with no UUID). Then settings are enabled, and the node is resaved, which should trigger UUIDs being created.

UUIDFunctionalityTestCase::testDisabledNodeUUID in ./uuid.test

Verify uuid behavior for nodes.

UUIDFunctionalityTestCase::testEnabledNodeUUID in ./uuid.test

Verify uuid behavior for nodes.

uuid_comment in ./uuid.module

Implementation of hook_comment().

uuid_nodeapi in ./uuid.module

Implementation of hook_nodeapi().

... See full list

File

./uuid.module, line 363

Main module functions for the uuid module.

Code

function uuid_uuid() {

  // If we're not using postgres, the database will give us a UUID.
  if ($GLOBALS['db_type'] != 'pgsql') {
    return db_result(db_query('SELECT UUID()'));
  }

  // If the function provided by the uuid pecl extension is available, use that.
  if (function_exists('uuid_create')) {
    return uuid_create(UUID_TYPE_DEFAULT);
  }

  // Fall back to generating a Universally Unique IDentifier version 4.
  // Base on http://php.net/manual/en/function.uniqid.php#65879
  // The field names refer to RFC 4122 section 4.1.2.
  return sprintf('%04x%04x-%04x-%03x4-%04x-%04x%04x%04x', mt_rand(0, 65535), mt_rand(0, 65535), mt_rand(0, 65535), mt_rand(0, 4095), bindec(substr_replace(sprintf('%016b', mt_rand(0, 65535)), '01', 6, 2)), mt_rand(0, 65535), mt_rand(0, 65535), mt_rand(0, 65535));
}