Response.php

/**
	 * @param bool $throw
	 * @throws RuntimeException
	 * @return bool
	 */
	private function canSendHeaders( $throw = false )
	{
		$result = headers_sent( $inFile, $atLine );

		if ( $result && $throw )
		{
			throw new RuntimeException( "Headers already sent in file: {$inFile} at line {$atLine}" );
		}

		return ! $result;
	}

/**
	 * @return void
	 */
	public function sendResponse()
	{
		$this->sendHeaders();

		$this->sendContent();
	}

	/**
	 * @return void
	 */
	public function sendHeaders()
	{
		if ( ! $this->canSendHeaders( true ) )
		{
			return;
		}

		header( 'HTTP/1.0 ' . $this->statusCode . ' ' . $this->statusText );

		if ( ! in_array( 'Content-Type', $this->httpHeaders ) )
		{
			header( 'Content-Type: ' . $this->contentType . ( empty( $this->charset ) ? '' : '; charset=' . $this->charset ) );
		}

		foreach ( $this->httpHeaders as $headerName => $headerValue )
		{
			header( $headerName . ': ' . $headerValue );
		}
	}

	/**
	 * @return void
	 */
	public function sendContent()
	{
		echo $this->content;
	}