parse_sdp_packet.php

<?php

function parse_sdp($packet = '')
{
	$out = array();

	$lines = explode("\n", $packet);
	foreach ($lines as $l)
	{
		$l = trim($l);
		$l = str_replace('=- ', '=', $l);
		@list($key, $val) = explode("=", $l);
		$key = trim($key);
		$val = trim($val);

		switch ($key)
		{
			// SDP version
			case 'v':
				$out['version'] = $val;
				break;

			// Origin
			case 'o':
				@list($username, $session_id, $version, $network_type, $address_type, $address) = explode(' ', $val);
				$out['origin'] = array(
					'username' => $username,
					'session_id' => $session_id,
					'start' => $username,
					'end' => $session_id,
					'version' => $version,
					'network_type' => $network_type,
					'address_type' => $address_type,
					'address' => $address,
				);
				unset($username, $session_id, $version, $network_type, $address_type, $address);
				break;

			// Session name
			case 's':
				$out['session_name'] = $val;
				break;

			// Connection data
			case 'c':
				@list($network_type, $address_type, $connection_address) = explode(' ', $val);
				$out['connection_data'] = array(
					'network_type' => $network_type,
					'address_type' => $address_type,
					'connection_address' => $connection_address,
				);
				unset($network_type, $address_type, $connection_address);
				break;

			// Times
			case 't':
				@list($start_time, $stop_time) = explode(' ', $val);
				$out['times'] = array(
					'start_time' => $start_time,
					'stop_time' => $stop_time,
				);
				unset($start_time, $stop_time);
				break;

			// Media announcements
			case 'm':
				@list($media, $port, $transport, $fmt_list) = explode(' ', $val);
				$out['media_announcements'] = array(
					'media' => $media,
					'port' => $port,
					'transport' => $transport,
					'fmt_list' => $fmt_list,
				);
				break;

			// Attributes
			case 'a':
				$out['attributes'][] = $val;
				break;
		}
		unset($key, $val);
	}

	return $out;
}


print_r(parse_sdp($msg));