note 115662 added to function.ldap-connect

If you don't want your PHP program to wait XXX seconds before giving up in a case when one of your corporate DC have failed, and since ldap_connect() does not have a mechanism to timeout on a user specified time, this is my workaround which shows excellent practical results. =========================================================== function serviceping($host, $port=389, $timeout=1) { $op = fsockopen($host, $port, $errno, $errstr, $timeout); if (!$op) return 0; //DC is N/A else { fclose($opanak); //explicitly close open socket connection return 1; //DC is up & running, we can safely connect with ldap_connect } } // ##### STATIC DC LIST, if your DNS round robin is not setup //$dclist = array('10.111.222.111', '10.111.222.100', '10.111.222.200'); // ##### DYNAMIC DC LIST, reverse DNS lookup sorted by round-robin result $dclist = gethostbynamel('domain.name'); foreach ($dclist as $k => $dc) if (serviceping($dc) == true) break; else $dc = 0; //after this loop, either there will be at least one DC which is available at present, or $dc would return bool false while the next line stops program from further execution if (!$dc) exit("NO DOMAIN CONTROLLERS AVAILABLE AT PRESENT, PLEASE TRY AGAIN LATER!"); //user being notified //now, ldap_connect would certainly connect succesfully to DC tested previously and no timeout will occur $ldapconn = ldap_connect($dc) or die("DC N/A, PLEASE TRY AGAIN LATER."); =========================================================== Also with this approach, you get a real nice failover functionality, take for an example a company with a dozen of DC-a distributed along distant places, this way your PHP program will always have high availability if at least one DC is active at present. ---- Server IP: 72.52.91.14 Probable Submitter: 89.216.53.20 ---- Manual Page -- http://php.net/manual/en/function.ldap-connect.php Edit -- https://master.php.net/note/edit/115662 Del: integrated -- https://master.php.net/note/delete/115662/integrated Del: useless -- https://master.php.net/note/delete/115662/useless Del: bad code -- https://master.php.net/note/delete/115662/bad+code Del: spam -- https://master.php.net/note/delete/115662/spam Del: non-english -- https://master.php.net/note/delete/115662/non-english Del: in docs -- https://master.php.net/note/delete/115662/in+docs Del: other reasons-- https://master.php.net/note/delete/115662 Reject -- https://master.php.net/note/reject/115662 Search -- https://master.php.net/manage/user-notes.php