drawing with php

[Jago6060]

I'm trying to create a pie chart with PHP.  What I want to do is make a pie chart that shows percentage of used and free disk space in a specific folder.  I have the pie chart created with static numbers, and I have the numbers for free and used space, but I'm not sure how to implement them into the pie chart creation process.  Do I use percentages to figure out the arc?

 

here is my code so far...

<?
//calculations for total space
$disk_total_space = disk_total_space("/var/www/htdocs");
$converted_total_space = ($disk_total_space/1048576);
$final_total_space = round($converted_total_space);

//calculations for free space
$disk_free_space = disk_free_space("/var/www/htdocs");
$converted_free_space = ($disk_free_space/1048576);
$final_free_space = round($converted_free_space);


//start of code for pie chart
header ("Content-type: image/png");
$handle = ImageCreate (100,100) or die ("Cannot create image");
$bg_color = ImageColorAllocate ($handle, 255,255,255);
$used = ImageColorAllocate ($handle, 0,0,255);
$free = ImageColorAllocate ($handle, 0,255,0);
ImageFilledArc($handle, 50, 50, 100, 90, 280, 0, $used, IMG_ARC_PIE);
ImageFilledArc($handle, 50, 50, 100, 90, 0, 280, $free, IMG_ARC_PIE);
ImagePng ($handle);
?>

[teng84]

not totally the same but try this link

http://www.phpfreaks.com/forums/index.php/topic,147174.0.html

[Barand]

Do I use percentages to figure out the arc?

 

 

Yes. 100% is 360 degrees, so 20% arc will be

 

20 * 360 / 100 degrees