SimpleMachines / SMF2.1

		// Request a passive connection - this means, we'll talk to you, you don't talk to us.

		@fwrite($this->connection, 'PASV' . "\r\n");

		$time = time();

		do

			$response = fgets($this->connection, 1024);

		while (strpos($response, ' ', 3) !== 3 && time() - $time < 5);

		// If it's not 227, we weren't given an IP and port, which means it failed.

		if (strpos($response, '227 ') !== 0)

		@fwrite($this->connection, 'PWD' . "\r\n");

		$time = time();

		do

			$response = fgets($this->connection, 1024);

		while ($response[3] != ' ' && time() - $time < 5);

		// Check for 257!

		if (preg_match('~^257 "(.+?)" ~', $response, $match) != 0)