note 102337 added to function.imagefilledarc

A simple pie chart generation script. 
Displays the percentage at center arc and displays the Legends with random colors. 

class simplepie
{
    function __construct($width, $height, $dataArr)
    {
        $font = './verdana.ttf'; /** get it from c:/windows/fonts dir */
        $this->image = imagecreate($width,$height);
        $piewidth = $width * 0.70;/* pie area */
        $x = round($piewidth/2);
        $y = round($height/2);
        $total = array_sum($dataArr);
        $angle_start = 0;
        $ylegend = 2;
        imagefilledrectangle($this->image, 0, 0, $width, $piewidth, imagecolorallocate($this->image, 128, 128, 128));
        foreach($dataArr as $label=>$value) {
            $angle_done    = ($value/$total) * 360; /** angle calculated for 360 degrees */
            $perc          = round(($value/$total) * 100, 1); /** percentage calculated */
            $color         = imagecolorallocate($this->image, rand(0, 255), rand(0, 255), rand(0, 255));
            imagefilledarc($this->image, $x, $y, $piewidth, $height, $angle_start, $angle_done+= $angle_start, $color, IMG_ARC_PIE);
            $xtext = $x + (cos(deg2rad(($angle_start+$angle_done)/2))*($piewidth/4));
            $ytext = $y + (sin(deg2rad(($angle_start+$angle_done)/2))*($height/4)); 
            imagettftext($this->image, 6, 0, $xtext, $ytext, imagecolorallocate($this->image, 0, 0, 0), $font, "$perc %");
            imagefilledrectangle($this->image, $piewidth+2, $ylegend, $piewidth+20, $ylegend+=20, $color); 
            imagettftext($this->image, 8, 0, $piewidth+22, $ylegend, imagecolorallocate($this->image, 0, 0, 0), $font, $label);
            $ylegend += 4;
            $angle_start = $angle_done;
        }
    }
    function render()
    {
        header('Content-type: image/png');
        imagepng($this->image);
    }
}
/** usage */
$dataArr = array(2001=>10, 2002=>30, 2003=>50, 2004=>10);
$width=600;
$height=480;
$pie = new simplepie($width, $height, $dataArr);
$pie->render();
----
Server IP: 69.147.83.197
Probable Submitter: 61.246.62.41
----
Manual Page -- http://www.php.net/manual/en/function.imagefilledarc.php
Edit        -- https://master.php.net/note/edit/102337
Del: integrated  -- https://master.php.net/note/delete/102337/integrated
Del: useless     -- https://master.php.net/note/delete/102337/useless
Del: bad code    -- https://master.php.net/note/delete/102337/bad+code
Del: spam        -- https://master.php.net/note/delete/102337/spam
Del: non-english -- https://master.php.net/note/delete/102337/non-english
Del: in docs     -- https://master.php.net/note/delete/102337/in+docs
Del: other reasons-- https://master.php.net/note/delete/102337
Reject      -- https://master.php.net/note/reject/102337
Search      -- https://master.php.net/manage/user-notes.php