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为什么我的php生成的图片不显示
//+------------------------+ 
//| pie3dfun.PHP//公用函数 | 
//+------------------------+ 
define("ANGLE_STEP", 3); //定义画椭圆弧时的角度步长 
define("FONT_USED", "C:\WINDOWS\Fonts\simhei.ttf"); // 使用到的字体文件位置 
function draw_getdarkcolor($img,$clr) //求$clr对应的暗色 

$rgb = imagecolorsforindex($img,$clr); 
return array($rgb["red"]/2,$rgb["green"]/2,$rgb["blue"]/2); 

function draw_getexy($a, $b, $d) //求角度$d对应的椭圆上的点坐标 

$d = deg2rad($d); 
return array(round($a*Cos($d)), round($b*Sin($d))); 

function draw_arc($img,$ox,$oy,$a,$b,$sd,$ed,$clr) //椭圆弧函数 

$n = ceil(($ed-$sd)/ANGLE_STEP); 
$d = $sd; 
list($x0,$y0) = draw_getexy($a,$b,$d); 
for($i=0; $i{ 
$d = ($d+ANGLE_STEP)>$ed?$ed:($d+ANGLE_STEP); 
list($x, $y) = draw_getexy($a, $b, $d); 
imageline($img, $x0+$ox, $y0+$oy, $x+$ox, $y+$oy, $clr); 
$x0 = $x; 
$y0 = $y; 


function draw_sector($img, $ox, $oy, $a, $b, $sd, $ed, $clr) //画扇面 

$n = ceil(($ed-$sd)/ANGLE_STEP); 
$d = $sd; 
list($x0,$y0) = draw_getexy($a, $b, $d); 
imageline($img, $x0+$ox, $y0+$oy, $ox, $oy, $clr); 
for($i=0; $i{ 
$d = ($d+ANGLE_STEP)>$ed?$ed:($d+ANGLE_STEP); 
list($x, $y) = draw_getexy($a, $b, $d); 
imageline($img, $x0+$ox, $y0+$oy, $x+$ox, $y+$oy, $clr); 
$x0 = $x; 
$y0 = $y; 

imageline($img, $x0+$ox, $y0+$oy, $ox, $oy, $clr); 
list($x, $y) = draw_getexy($a/2, $b/2, ($d+$sd)/2); 
imagefill($img, $x+$ox, $y+$oy, $clr); 

function draw_sector3d($img, $ox, $oy, $a, $b, $v, $sd, $ed, $clr) //3d扇面 

draw_sector($img, $ox, $oy, $a, $b, $sd, $ed, $clr); 
if($sd{ 
list($R, $G, $B) = draw_getdarkcolor($img, $clr); 
$clr=imagecolorallocate($img, $R, $G, $B); 
if($ed>180) $ed = 180; 
list($sx, $sy) = draw_getexy($a,$b,$sd); 
$sx += $ox; 
$sy += $oy; 
list($ex, $ey) = draw_getexy($a, $b, $ed); 
$ex += $ox; 
$ey += $oy; 
imageline($img, $sx, $sy, $sx, $sy+$v, $clr); 
imageline($img, $ex, $ey, $ex, $ey+$v, $clr); 
draw_arc($img, $ox, $oy+$v, $a, $b, $sd, $ed, $clr); 
list($sx, $sy) = draw_getexy($a, $b, ($sd+$ed)/2); 
$sy += $oy+$v/2; 
$sx += $ox; 
imagefill($img, $sx, $sy, $clr); 


function draw_getindexcolor($img, $clr) //RBG转索引色 

$R = ($clr>>16) & 0xff; 
$G = ($clr>>8)& 0xff; 
$B = ($clr) & 0xff; 
return imagecolorallocate($img, $R, $G, $B); 

// 绘图主函数,并输出图片 
// $datLst 为数据数组, $datLst 为标签数组, $datLst 为颜色数组 
// 以上三个数组的维数应该相等 
function draw_img($datLst,$labLst,$clrLst,$a=200,$b=90,$v=20,$font=10) 

$ox = 5+$a; 
$oy = 5+$b; 
$fw = imagefontwidth($font); 
$fh = imagefontheight($font); 
$n = count($datLst);//数据项个数 
$w = 10+$a*2; 
$h = 10+$b*2+$v+($fh+2)*$n; 
$img = imagecreate($w, $h); 
//转RGB为索引色 
for($i=0; $i$clrLst[$i] = draw_getindexcolor($img,$clrLst[$i]); 
$clrbk = imagecolorallocate($img, 0xff, 0xff, 0xff); 
$clrt = imagecolorallocate($img, 0x00, 0x00, 0x00); 
//填充背景色 
imagefill($img, 0, 0, $clrbk); 
//求和 
$tot = 0; 
for($i=0; $i

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