Display CPU usage load

I want to display the cpu usage % in image, like this:
http://virusscan.jotti.org/
any idea how can I do that? Thanks

you need 4 different images, each one with 1 pixel width. all with the same height.
image1 is the left border of your bar.

image2 is a the bar increment, and on top and bottom a piece of the border, like this:
.
|
.

image3 is the same as image2 but without the bar increment, just the bottom and top pixels of the border:
.

.
image4 is the right border of the bar.
then for representing a bar 60% full you should put in the same html table cell:
image1 once;
image2 60times;
image3 40times;
image4 once;
remember to put on the img params: border="0"

This example is the simpliest, no need to create images in php ( requiring gd libraries etc etc), just loops. Of course there are more ways to solve this problem.

I this explanation I'm assuming you use one pixel bars for each percent unit, but you can always adjust proportions.

you would need to exec() some linux command to find the current CPU usage and then either create an image or make a table/graph out of that data .. cat /proc/stat shows some cpu usage info but you would still have to parse that.

well I just explained the construction, missed the part of obtaining data.
thks firepages.

Thanks. Do you know what php code to use?
And maybe the width of the image | will just change depending on how much %?

varying widths is also a good aproach, since my example contains images that can be extruded horizontally without vertical deformation, but you still need the 4 images.
No time to create php code, sorry.

I tried making one. But I am having errors. Can you tell me whats wrong?

<?php
$uptime = exec('uptime');
$uptimeArray = split(",", $string);
array_reverse($uptimeArray);
array_pad($uptimeArray, 3);

echo '<img src="images/bar.jpg" alt="" width="' . $uptime . '" />';
?>

This works for me ...


<?php
$uptime = exec('uptime');
$uptime = explode(",",$uptime);
//print_r($uptime);
$uptime = explode(':',$uptime[2]);
echo '<img src="images/bar.jpg" alt="" width="' . $uptime[1] . '" />';
?>

# cat /proc/loadavg
might be useful as well ?

Ill try it soon!