php做饼图的函数（转）

php做饼图的函数
作者：qdlover   发表日期：2000年9月15日   阅读次数：14
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再介绍一下我自己，呵呵
我是个新手，当时学php纯粹是为了应付领导哦，让我们做统计图，我本来是学asp的，突然改行很不适应，不过php功能的确很强大呀，呵呵，我都离不了他了，这不，饼图，柱型图都搞定了，可是还有很多问题我不会，还希望大家多指教呀，说了好多废话了，我还以为是在写信那
我的联系方式是：
               email:qingdaohb@yeah.net
               http://qdlover.yeah.net
老板催了，没办法，饼图函数出炉了，大家快抢呀

########
bimage.php3
########
<?
/*
函数说明
$chartdata:数据，是数组元素
$chartfont:字号
$chartdiameter:决定饼的大小（要看你饿不饿了，呵呵）
$chartlabel:标题，也是数组元素
$colorslice:颜色数组，例如$tmp=array255,255,255);$colorslic=array($tmp);
$colorborder:边框颜色，数组
$colortext :文本颜色,数组
$colorbody:背景颜色，数组
$file:输出图片文件名*/
function bimage($chartdata,
                $chartfont,
                $chartdiameter ,
                $chartlabel ,
                $colorslice,
                $colorbody ,
                $colorborder,
                $colortext ,
                $file
                )
{
$chartdiameter=150;

     $chartfontheight=imagefontheight($chartfont);
     $d1=10;$d2=20;$d3=30;$d4=40;$d5=50;
     $chartdata=array($d1,$d2,$d3,$d4,$d5);
     $chartlabel=array("D1","D2","D3","D4","D5");
     $chartwidth=$chartdiameter+20;
     $chartheight=$chartdiameter+20+(($chartfontheight+2)*count($chartdata));
     header("content-type:image/gif");
     $image=imagecreate($chartwidth,$chartheight);
$colorbody =imagecolorallocate ($image,$colorbody[0],$colorbody[1],$colorbody[2]);
$colortext =imagecolorallocate ($image,$colortext[0],$colortext[1],$colortext[2]);
$colorborder =imagecolorallocate ($image,$colorborder[0],$colorborder[1],$colorborder[2]);
for ($i=0;$i<count($colorslice);$i++)
{
$t=imagecolorallocate($image,$colorslice[$i][0],$colorslice[$i][1],$colorslice[$i][2]);
$colorslice[$i]=$t;
}




     for($i=0;$i<count($chartdata);$i++)
     {
     $charttotal+=$chartdata[$i];
     }
     $chartcenterx=$chartdiameter/2+10;
     $chartcentery=$chartdiameter/2+10;
    $degrees=0;
    for($i=0;$i<count($chartdata);$i++)
    {
    $startdegrees=round($degrees);
    $degrees+=(($chartdata[$i]/$charttotal)*360);
    $enddegrees=round($degrees);
    $currentcolor=$colorslice[$i%(count($colorslice))];
    imagearc($image ,
             $chartcenterx,
             $chartcentery,
             $chartdiameter,
             $chartdiameter,
             $startdegrees,
             $enddegrees,
             $currentcolor);
             list($arcx,$arcy)=circle_point($startdegrees,$chartdiameter);

             imageline($image,
                       $chartcenterx,
                       $chartcentery,
                       floor($chartcenterx+$arcx),
                       floor($chartcentery+$arcy),
                       $currentcolor );
             list($arcx,$arcy)=circle_point($enddegrees,$chartdiameter);

             imageline($image,
                       $chartcenterx,
                       $chartcentery,
                       ceil($chartcenterx+$arcx),
                       ceil($chartcentery +$arcy),
                       $currentcolor);

             $midpoint=round((($enddegrees-$startdegrees)/2)+$startdegrees);
             list($arcx,$arcy)= circle_point ( $midpoint, $chartdiameter/2);
             imagefilltoborder($image,
                               floor($chartcenterx+$arcx),
                               floor($chartcentery+$arcy),
                               $currentcolor,
                               $currentcolor);
     }
     imagearc($image,
              $chartcenterx,
              $chartcentery,
              $chartdiameter,
              $chartdiameter,
              0,360,
              $colorborder);
     imagefilltoborder ($image,
                        floor($chartcenterx +( $chartdiameter /2)+2),
                        $chartcentery ,
                        $colorborder,
                        $colorborder );
      for ($i=0;$i<count($chartdata);$i++)
      {
      $currentcolor=$colorslice[$i%(count($colorslice))];
      $liney=$chartdiameter+20+($i*($chartfontheight+2));
      imagerectangle ($image,
                      10,
                      $liney,
                      20+$chartfontheight,
                      $liney+$chartfontheight,
                      $colorbody);
      imagefilltoborder($image,
                       12,
                       $liney+2,
                       $colorbody,
                       $currentcolor);
      imagestring($image,
                  $chartfont,
                  40+$chartfontheight,
                  $liney,
                  "$chartlabel[$i]:$chartdata[$i]",
                  $colortext);

      }


         imagegif ($image,$file);

}

function radians($degrees)
     {
     return($degrees*(pi()/180.0));
     }
function circle_point($degrees,$diameter)
     {
     $x=cos(radians($degrees))*($diameter/2);
     $y=sin(radians($degrees))*($diameter/2);
     return (array($x,$y));
     }
            ?>
###########
这是一个调用的例子
###########

<?
include("bfunc.php3");
$chartdiameter=250;
     $chartfont=5;
     $d1=10;$d2=20;$d3=30;$d4=40;$d5=50;
     $chartdata=array($d1,$d2,$d3,$d4,$d5);
     $chartlabel=array("D1","D2","D3","D4","D5");

     $colorbody=array(0xff,0xff,0xff);
     $colorborder=array(0x00,0x00,0x00);
     $colortext=array(0xff,0xff,0xff);

     $color1=array(0xff,0x00,0x00);
     $color2=array(0x00,0xff,0x00);
     $color3=array(0x00,0x00,0xff);
     $color4=array(0xff,0xff,0x00);
     $color5=array(0xff,0x00,0xff);
     $colorslice=array($color1 ,$color2,$color3,$color4,$color5);
$file="tj.gif"
bimage($chartdata,
       $chartfont,
       $chartdiameter ,
       $chartlabel ,
       $colorslice,
       $colorbody ,
       $colorborder,
       $colortext ,
       $file       )
?>


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原文转自：http://www.ltesting.net