PHP生成 uuid

// ?生成UUID，并去掉分割符function guid() { ???if (function_exists(‘com_create_guid‘)){ ???????$uuid = com_create_guid(); ???}else{ ???????mt_srand((double)microtime()*10000);//optional for php 4.2.0 and up. ???????$charid = strtoupper(md5(uniqid(rand(), true))); ???????$hyphen = chr(45);// "-" ???????$uuid = chr(123)// "{" ???????????????.substr($charid, 0, 8).$hyphen ???????????????.substr($charid, 8, 4).$hyphen ???????????????.substr($charid,12, 4).$hyphen ???????????????.substr($charid,16, 4).$hyphen ???????????????.substr($charid,20,12) ???????????????.chr(125);// "}" ???} ???$uuid = str_replace(array(‘-‘, ‘{‘, ‘}‘), ‘‘, $uuid); ???return $uuid;}