public function __construct($mode, $size, $data, $bstream = null)
{
$setData = array_slice($data, 0, $size);
if (count($setData) < $size) {
$setData = array_merge($setData, array_fill(0, $size - count($setData), 0));
}
if (!wechat_qrcode_QRinput::check($mode, $size, $setData)) {
throw new Exception('Error m:' . $mode . ',s:' . $size . ',d:' . join(',', $setData));
return null;
}
$this->mode = $mode;
$this->size = $size;
$this->data = $setData;
$this->bstream = $bstream;
}
