function return_wmid($purse) {

$request="<request><purse>$purse</purse></request>";

$url="https://passport.webmoney.ru/xml/XMLGetWMIDInfo.aspx";

$ch = curl_init($url);

curl_setopt($ch, CURLOPT_HEADER, 0);

curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);

curl_setopt($ch, CURLOPT_POST,1);

curl_setopt($ch, CURLOPT_POSTFIELDS, $request);

$result=curl_exec($ch);

$xmlres = simplexml_load_string($result);

$wmid=$xmlres->certinfo->wmids->row[wmid];

return $wmid;

}