Making Usage Statistics in PHP - Charting the Results

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There is another interesting thing, that I've done it with $visitors array. It's keys are the hostnames of the visitors, values are the number of their visits. To draw them in our figure, I use $pixel_per_visit. That's relative to the Top 1 - the visitor whose column is the highest on the diagram.


imageline($image, 20, 20, 20, 180, $pen);
// The vertical axe
imageline($image, 15, 25, 20, 20, $pen);
// The arrow
imageline($image, 25, 25, 20, 20, $pen);
imageline($image, 20, 180, 380, 180, $pen);
// The horizontal axe
imageline($image, 375, 175, 380, 180, $pen);
imageline($image, 375, 185, 380, 180, $pen);
$visitors=array();
 
while ($stat=mysql_fetch_array($stat_r))
    $visitors[$stat['Host']]=$stat['Count_ID'];
        // Loading up the array...
    $max=current($visitors);
       // How many pages did the Top 1 visit?
    $pixel_per_visit=150/$max;
       // This is because we get the data
       // in number of visits, not in pixels
 
    $i=0;
      // This is for the loop, to know
      // the number of the current visitor


   foreach($visitors as $host => $visits) {
     // now $visits is number of visits
   imagefilledrectangle($image, 35+$i*30, 180-(visits*$pixel_per_visit),
        45+$i*30, 180, $pen);
   imagettftext($image, 8, 0, 40+$i*30, 175-($visits*$pixel_per_visit),
   $pen, "\windows\fonts\arial.ttf", $host);
   imagettftext($image, 15, 0, 32+(($i++)*30), 200,
   $pen,"\windows\fonts\arial.ttf", $visits);
}



When you're ready with drawing the figure you have to send the output to the browser. Here are the functions and the code:

1. ImageGIF (resource image) - Outputs the image in GIF format
2. ImageJPEG (resource image) - Outputs the image in JPEG format
3. ImagePNG (resource image) - Outputs the image in PNG format imagepng($image);

Note that these functions accept an optional second argument, the name of a new file to save the picture there. This can be useful if you'd like to make a picture saving option for your site.
And here's the result:

 

 

 

 

 

 

Next: Before Saying Goodbye >>
 

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