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<?php
namespace Openbuildings\Spiderling;
/**
* Network helper for deailng with ports
*
* @package Openbuildings\Spiderling
* @author Ivan Kerin
* @copyright (c) 2013 OpenBuildings Ltd.
* @license http://spdx.org/licenses/BSD-3-Clause
*/
class Network {
* Check if a port is open
* @param string $host
* @param integer $port
* @return boolean
public static function is_port_open($host, $port)
{
$connection = @fsockopen($host, $port);
if (is_resource($connection))
fclose($connection);
return FALSE;
}
return TRUE;
* Find an open port in a given range, trying several times.
* Return FALSE if no open port is found after a timeout (1 second by default)
* @param integer $range_start
* @param integer $range_end
* @param integer $timeout
* @return integer|boolean
public static function ephimeral_port($host, $range_start = 1000, $range_end = 5000, $timeout = 1000)
return Attempt::make(function() use ($host, $range_start, $range_end) {
$port = rand($range_start, $range_end);
return Network::is_port_open($host, $port) ? $port : FALSE;
}, $timeout);
OpenBuildings /
spiderling
