求一个饼状图或柱状图php生成类或例子

php代码:--------------------------------------------------------------------------------
/*-------------------------------------------------------------------------*/
//
// module name: 一个3d的饼图类
//
// author:avenger(avenger@php.net) last modify: 2002-10-30 11:19
// copyright (c) 2002 by avenger
/*-------------------------------------------------------------------------*/

//公用函数部分

//把角度转换为弧度
function deg2arc($degrees) {
return($degrees * (pi()/180.0));
}

//rgb
function getrgb($color){
$r=($color>>16) & 0xff;
$g=($color>>8) & 0xff;
$b=($color) & 0xff;
return (array($r,$g,$b));
}

// 取得在椭圆心为（0，0）的椭圆上 x,y点的值
function pie_point($deg,$va,$vb){
$x= cos(deg2arc($deg)) * $va;
$y= sin(deg2arc($deg)) * $vb;
return (array($x, $y));
}


//3d饼图类

class pie3d{

var $a; //椭圆长半轴
var $b; //椭圆短半轴
var $dataarray; //每个扇形的数据
var $colorarray; //每个扇形的颜色 要求按照十六进制书写但前面不加0x
var $fize; //字体大小
//为边缘及阴影为黑色

function pie3d($pa=60,$pb=30,$sdata="100,200,300,400,500", $scolor="ee00ff,dd0000,cccccc,ccff00,00ccff",$fontsize=1) {
$this->a=$pa;
$this->b=$pb;
$this->dataarray=split(",",$sdata);
$this->colorarray=split(",",$scolor);
$this->fsize=$fontsize;
}

function seta($v){
$this->a=$v;
}

function geta(){
return $this->a;
}

function setb($v){
$this->b=$v;
}

function getb(){
return $this->b;
}

function setdataarray($v){
$this->dataarray=split(",",$v);
}

function getdataarray($v){
return $this->dataarray;
}

function setcolorarray($v){
$this->colorarray=split(",",$v);
}

function getcolorarray(){
return $this->colorarray;
}


function drawpie(){
$fsize=$this->fsize;
$image=imagecreate($this->a*2+40,$this->b*2+40);
$piecenterx=$this->a+10;
$piecentery=$this->b+10;
$doublea=$this->a*2;
$doubleb=$this->b*2;
list($r,$g,$b)=getrgb(0);
$colorborder=imagecolorallocate($image,$r,$g,$b);
$datanumber=count($this->dataarray);

//$datatotal
for($i=0;$i<$datanumber;$i++) $datatotal+=$this->dataarray[$i]; //算出数据和

//填充背景
imagefill($image, 0, 0, imagecolorallocate($image, 255, 255, 255));

/*
** 画每一个扇形
*/

$degrees = 0;
for ($i = 0; $i < $datanumber; $i++) {
$startdegrees = round($degrees);
$degrees += (($this->dataarray[$i]/$datatotal)*360);
$enddegrees = round($degrees);
$percent = number_format($this->dataarray[$i]/$datatotal*100, 1);
list($r,$g,$b)=getrgb(hexdec($this->colorarray[$i]));
$currentcolor=imagecolorallocate($image,$r,$g,$b);
if ($r>60 and $r<256) $r=$r-60;
if ($g>60 and $g<256) $g=$g-60;
if ($b>60 and $b<256) $b=$b-60;
$currentdarkcolor=imagecolorallocate($image,$r,$g,$b);

//画扇形弧
imagearc($image,$piecenterx,$piecentery,$doublea,$doubleb,$startdegrees,$enddegrees,$currentcolor);

//画直线
list($arcx, $arcy) = pie_point($startdegrees , $this->a , $this->b);
imageline($image,$piecenterx,$piecentery,floor($piecenterx + $arcx),floor($piecentery + $arcy),$currentcolor);

//画直线
list($arcx, $arcy) = pie_point($enddegrees,$this->a , $this->b);
imageline($image,$piecenterx,$piecentery,ceil($piecenterx + $arcx),ceil($piecentery + $arcy),$currentcolor);

//填充扇形
$midpoint = round((($enddegrees - $startdegrees)/2) + $startdegrees);
list($arcx, $arcy) = pie_point($midpoint, $this->a*3/4 , $this->b*3/4);

imagefilltoborder($image,floor($piecenterx + $arcx),floor($piecentery + $arcy),$currentcolor,$currentcolor);
imagestring($image,$fsize,floor($piecenterx + $arcx-5),floor($piecentery + $arcy-5),$percent."%",$colorborder);

//画阴影
if ($startdegrees>=0 and $startdegrees<=180){
if($enddegrees<=180){
for($k = 1; $k < 15; $k++)
imagearc($image,$piecenterx, $piecentery+$k,$doublea, $doubleb, $startdegrees, $enddegrees, $currentdarkcolor);
}else{
for($k = 1; $k < 15; $k++)
imagearc($image,$piecenterx, $piecentery+$k,$doublea, $doubleb, $startdegrees, 180, $currentdarkcolor);
}
}
}

//输出生成的图片
imagepng($image,'consture.png');
imagedestroy($image);
}//end drawpie()
}//end class
$pie = new pie3d;
$pie->pie3d($pa=300,$pb=150,$sdata="100,200,300,400,500", $scolor="ee00ff,dd0000,cccccc,ccff00,ddddaa",$fontsize=5);
$pie->drawpie();
echo '<img src="consture.png" border=0 alt="交易分析图">';

?>