
php生成GUID
php生成GUID
function create_guid(){ $charid = strtoupper(md5(uniqid(mt_rand(), true))); $hyphen = chr(45);// "-" $uuid = substr($charid, 6, 2).substr($charid, 4, 2).substr($charid, 2, 2) .substr($charid, 0, 2).$hyphen.substr($charid, 10, 2).substr($charid, 8, 2).$hyphen .substr($charid,14, 2).substr($charid,12, 2).$hyphen .substr($charid,16, 4).$hyphen.substr($charid,20,12); return $uuid; }