/**
* Decode the property by inspecting the nibbles of each blob, checking the control, and adding up the results into
* a final value.
*
* @param string $hex
* @param bool $string Whether or not this is simple string data.
* @return string
*/
protected function decodePropValue($hex, $string = false)
{
$decodePropValue = '';
$blobs = str_split($hex, 6);
foreach ($blobs as $blob) {
$bin = decbin(hexdec($blob));
$controlY = substr($bin, 4, 6);
$nibbleY = substr($bin, 10, 4);
$controlX = substr($bin, 14, 6);
$nibbleX = substr($bin, 20, 4);
$byte = $this->nibbleControl($nibbleX, $controlX) . $this->nibbleControl($nibbleY, $controlY);
if ($string) {
$decodePropValue .= MBString::chr(bindec($byte));
} else {
$decodePropValue = $this->dec2hex(bindec($byte)) . $decodePropValue;
}
}
return $decodePropValue;
}
/**
* Decode and parse the binary dial-in data from the userParameters attribute (the data between 44 and 96 bytes).
*
* @param string $binary
*/
protected function decode($binary)
{
$hex = bin2hex($binary);
$this->signature = MBString::chr(hexdec(substr($hex, 0, 2)));
$this->userPrivilege = hexdec(substr($hex, 2, 2));
$this->callbackPhoneNumber = substr($hex, 4, 48);
}