AppleMessage::getPayload

public function getPayload()
{
	$sJSONPayload = str_replace(
		'"' . self::APPLE_RESERVED_NAMESPACE . '":[]',
		'"' . self::APPLE_RESERVED_NAMESPACE . '":{}',
		json_encode($this->_getPayload(), static::JSON_OPTIONS)
	);
	$nJSONPayloadLen = strlen($sJSONPayload);
	if ($nJSONPayloadLen <= $this->payloadMaxSize)
	{
		return $sJSONPayload;
	}
	if (!$this->_bAutoAdjustLongPayload)
	{
		return false;
	}

	$text = $this->text;
	$useSenderText = false;
	if(array_key_exists("senderMessage", $this->customProperties))
	{
		$useSenderText = true;
		$text = $this->customProperties["senderMessage"];
	}
	$nMaxTextLen = $nTextLen = strlen($text) - ($nJSONPayloadLen - $this->payloadMaxSize);
	if ($nMaxTextLen <= 0)
	{
		return false;
	}

	while (strlen($text) > $nMaxTextLen)
	{
		$text = substr($text, 0, --$nTextLen);
	}
	if($useSenderText)
	{
		$this->setCustomProperty("senderMessage", $text);
	}
	else
	{
		$this->setText($text);
	}
	return $this->getPayload();
}