php生成guid

function getGUID() {

if (function_exists(‘com_create_guid‘)) {

return com_create_guid();

} else {

mt_srand((double) microtime() * 10000); //optional for php 4.2.0 and up.

$charid = strtoupper(md5(uniqid(rand(), true)));

$hyphen = chr(45); // "-"

$uuid = substr($charid, 0, 8) . $hyphen

. substr($charid, 8, 4) . $hyphen

. substr($charid, 12, 4) . $hyphen

. substr($charid, 16, 4) . $hyphen

. substr($charid, 20, 12);

return $uuid;

}

}

php生成guid

原文：http://my.oschina.net/lbp0200/blog/496783