note 47495 added to function.fsockopen

Ping from PHP script. (Without system call) This is of cause not a real ping since there is no support for ICMP. So it can't send a packet and get it back. But the important thing is to get a response from the server, even if it is only a ICMP error message. That way it verifies the servers existens and calculate the round trip time, which is the essential function of ping. It work well on all servers I have tried, with the echo service running. <? $host='www.php.com'; $timeout=2; //Open the socket $handle=fsockopen('ddp://'.$host, 7, $errno, $errstr, $timeout); if (!$handle) echo "$errstr ($errno)<br>\r\n"; else { //Set read timeout stream_set_timeout($handle, $timeout); for($i=0;$i<3;$i++){ //Time the responce list($usec, $sec) = explode(" ", microtime(true)); $start=(float)$usec + (float)$sec; //send somthing $write=fwrite($handle,"echo this\n"); if(!$write){ echo "Error in writing to socked<br>\r\n"; break; } echo 'Send packet to '.$host; //Try to read. the server will most likely respond with a "ICMP Destination Unreachable" and end the read. But that is a responce! fread($handle,1024); //Work out if we got a responce and time it list($usec, $sec) = explode(" ", microtime(true)); $laptime=((float)$usec + (float)$sec)-$start; if($laptime>$timeout) echo " : No reply<br>\r\n"; else echo " : Round trip = ".round($laptime,3)." s<br>\r\n"; } fclose($handle); } ?> ---- Manual Page -- http://www.php.net/manual/en/function.fsockopen.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+47495 Delete -- http://master.php.net/manage/user-notes.php?action=delete+47495&report=yes Reason: bad code -- http://master.php.net/manage/user-notes.php?action=delete+47495&report=yes&reason=bad+code Reason: spam -- http://master.php.net/manage/user-notes.php?action=delete+47495&report=yes&reason=spam Reason: useless example -- http://master.php.net/manage/user-notes.php?action=delete+47495&report=yes&reason=useless+example Reason: contains commercial links -- http://master.php.net/manage/user-notes.php?action=delete+47495&report=yes&reason=contains+commercial+links Reason: useless note -- http://master.php.net/manage/user-notes.php?action=delete+47495&report=yes&reason=useless+note Reject -- http://master.php.net/manage/user-notes.php?action=reject+47495&report=yes Search -- http://master.php.net/manage/user-notes.php