Webmoney - Click&Buy интерфейс: подпись

$url = '<http://www.allchita.ru/wm/yes.php>'
$purse = 'Z365093475483'
$desc = 'PLATA'
$mode = 'test'
$pass = '111111'

$amount = $_GET['pci_amount'];
$WMID = $_GET['WMID'];
$pci_wmtid = $_GET['pci_wmtid'];
$pci_pursesrc = $_GET['pci_pursesrc'];
$pci_pursedest = $_GET['pci_pursedest'];
$pci_amount = $_GET['pci_amount'];
$pci_desc = $_GET['pci_desc'];
$pci_datecrt = $_GET['pci_datecrt'];

$pci_marker = $_GET['pci_marker'];

$ms1=StrtoUpper($url.$purse.$amount.$desc.$mode);

#generatehash
$md5p=md5($pass);
$md5p=StrtoUpper($md5p);

$ms1=md5($ms1);
$ms1=StrtoUpper($ms1);
$x1=$pci_wmtid.$WMID.$ms1.$pci_pursesrc.$pci_pursedest.$pci_amount.$pci_desc.$pci_datecrt.$mode;


@$fd=fopen("logmoney.wm","a");
@$s="WMID: $WMID
$pci_pursesrc
$pci_pursedest
$pci_amount
$pci_desc
$pci_datecrt
$pci_mode

";
@fputs ($fd,$s);
@fclose($fd);

$mysign=md5($x1.$md5p);
$accept=1;

if ($pci_pursedest!=$purse) { $accept==0; }
$p1=intval($pci_amount);
$p2=intval($amount);
if ($p1!=$p2) { $accept==0; }

$mysign=StrtoUpper($mysign);

if ($pci_marker!=$mysign) { die ("ÍÅ ñîâïàëî! $pci_marker è $mysign"); }

if (($accept==1) and ($pci_mode="test")) { $accept=3; }

if ($accept==1) {
echo "OK";
}

if ($accept==3) {
echo "error!";
}

if ($accept==0) {
echo "error!";
}