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PHP generated GUID (UUID)

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2016-07-25 08:46:062271browse

PHP generated GUID (UUID)
  1. /**
  2.      * 生成GUID（UUID）
  3.      * @access public
  4.      * @return string
  5.      * @author knight
  6.      */
  7.     function createGuid()
  8.     {
  9.         if (function_exists('com_create_guid')){
  10.             return com_create_guid();
  11.         }else{
  12.             mt_srand((double)microtime()*10000);
  13.             $charid = strtoupper(md5(uniqid(rand(), true)));
  14.             $hyphen = chr(45);// "-"
  15.             $uuid = chr(123)// "{"
  16.                 .substr($charid, 0, 8).$hyphen
  17.                 .substr($charid, 8, 4).$hyphen
  18.                 .substr($charid,12, 4).$hyphen
  19.                 .substr($charid,16, 4).$hyphen
  20.                 .substr($charid,20,12)
  21.                 .chr(125);// "}"
  22.             return $uuid;
  23.         }
  24.     }
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