/**
* @param string $host
* @param int $port
* @param int $timeout
* @param bool $persistent
*
* @return resource
* @throws ConnectionException
*/
public function open($host, $port, $timeout, $persistent = true)
{
if (!is_null($this->socket)) {
$this->close();
}
if ($persistent) {
$socket = @pfsockopen($host, $port, $errno, $errstr, $timeout);
} else {
$socket = @fsockopen($host, $port, $errno, $errstr, $timeout);
}
if (false === $socket) {
throw ConnectionException::CouldNotConnect($host, $port, $errno, $errstr);
} else {
return $this->socket = $socket;
}
}
