Instructions

Server side

Usually the HTTP request would point to a dedicated web server page with

scripting capabilities. For example we assume a page called www.server.com/

multilogger.php. On the server side this page would contain some scripting

that decodes the data, checks its contents and store the data into a data

storage. Other webpages can be used to report measurements from this

storage. This document is not intended to be a scripting manual; we refer to

themanyhelpavailableelsewhere.PleaselookatthePHPhelptopic‘varia-

blesfromoutsidePHP’forexample.Inordertoprovideaquickstartweshow

how variables can be evaluated on a PHP page:

PHP EXAMPLE

<?php

// multilogger.php

//needs6arguments,separatedby‘&’:

// The message would be: abcdef&&$d&&$t&&$i&&$v

//argument0=‘password’(abcdef)

// argument 1 = $d date // argument 2 = $t time

// argument 3 = $i sensor id

/ argument 4 = $v sensor value

$args = explode (“&”, $QUERY_STRING );

$nargs = count($args);

if ($nargs != 5)

{

die();

}

if ($args[0] != “abcdef”)

{

die();

}

$date = urldecode($args[1]) ;

$time = urldecode($args[2]) ;

$device = urldecode($args[3]);

$temperature = urldecode($args[4]);

$date=str_replace(“’”,““,$date);

$time=str_replace(“’”,““,$time);

$device=str_replace(“’”,““,$device);

$temperature=str_replace(“’”,““,$temperature);

// log it

 $db=mysql_connect(‘server’,‘user’,‘password’);

 $result=mysql_select_db(‘database_name’,$db);

 $result=mysql_query(“deletefromtemperaturewhere(device=’$device’)”);

$result = mysql_query(“INSERT INTO temperature (logdate, logtime, device, temperature)

VALUES(‘$date’,‘$time’,‘$device’,‘$temperature’)”,$db);

$result = mysql_close($db);