silverstripe / sspak

		$process = proc_open($command, $pipeSpec, $pipes);

		if($options['inputContent']) {

			fwrite($pipes[0], $options['inputContent']);

		} else if($options['inputStream']) {

			while($content = fread($options['inputStream'], 8192)) {

				fwrite($pipes[0], $content);

			}

		}

		if(isset($pipes[0])) fclose($pipes[0]);

		$result = array();

			// If a stream was provided, then pipe all the content

			// Doing it this way rather than passing outputStream to $pipeSpec

			// Means that streams as well as simple FDs can be used

			if($options['outputStream']) {

				while($content = fread($pipes[1], 8192)) {

					fwrite($options['outputStream'], $content);

				}

			// Otherwise save to a string

			} else {

				$result['output'] = stream_get_contents($pipes[1]);

			}

			fclose($pipes[1]);

		}

		if(isset($pipes[2])) {