生成饼图很多代码都可以实现,今天我们介绍的这个实例是基于php gd库的一种生成统计数据的饼图效果,有需要的同学可以参考一下,代码如下:
- <?php
-
-
-
- define("ANGLE_STEP", 5);
- function draw_getdarkcolor($img,$clr)
- {
- $rgb = imagecolorsforindex($img,$clr);
- return array($rgb["red"]/2,$rgb["green"]/2,$rgb["blue"]/2);
- }
- function draw_getexy($a, $b, $d)
- {
- $d = deg2rad($d);
- return array(round($a*Cos($d)), round($b*Sin($d)));
- }
- function draw_arc($img,$ox,$oy,$a,$b,$sd,$ed,$clr)
- {
- $n = ceil(($ed-$sd)/ANGLE_STEP);
- $d = $sd;
- list($x0,$y0) = draw_getexy($a,$b,$d);
- for($i=0; $i<$n; $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)
- {
- $n = ceil(($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; $i<$n; $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, $clr)
- {
- draw_sector($img, $ox, $oy, $a, $b, $sd, $ed, $clr);
- if($sd<180)
- {
- 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)
- {
- $R = ($clr>>16) & 0xff;
- $G = ($clr>>8)& 0xff;
- $B = ($clr) & 0xff;
- return imagecolorallocate($img, $R, $G, $B);
- }
-
-
-
- function draw_img($datLst,$labLst,$clrLst,$a=250,$b=120,$v=20,$font=10)
- {
- $ox = 5+$a;
- $oy = 5+$b;
- $fw = imagefontwidth($font);
- $fh = imagefontheight($font);
- $n = count($datLst);
- $w = 10+$a*2;
- $h = 10+$b*2+$v+($fh+2)*$n;
- $img = imagecreate($w, $h);
-
- for($i=0; $i<$n; $i++)
- $clrLst[$i] = draw_getindexcolor($img,$clrLst[$i]);
- $clrbk = imagecolorallocate($img, 0xff, 0xff, 0xff);
- $clrt = imagecolorallocate($img, 0x00, 0x00, 0x00);
-
- imagefill($img, 0, 0, $clrbk);
-
- $tot = 0;
- for($i=0; $i<$n; $i++)
- $tot += $datLst[$i];
- $sd = 0;
- $ed = 0; 333
- $ly = 10+$b*2+$v;
- for($i=0; $i<$n; $i++)
- {
- $sd = $ed;
- $ed += $datLst[$i]/$tot*360;
-
- draw_sector3d($img, $ox, $oy, $a, $b, $v, $sd, $ed, $clrLst[$i]);
-
- imagefilledrectangle($img, 5, $ly, 5+$fw, $ly+$fh, $clrLst[$i]);
- imagerectangle($img, 5, $ly, 5+$fw, $ly+$fh, $clrt);
-
- $str = iconv("GB2312", "UTF-8", $labLst[$i]);
- ImageTTFText($img, $font, 0, 5+2*$fw, $ly+13, $clrt, "./simsun.ttf", $str.":".$datLst[$i]."(".(round(10000*($datLst[$i]/$tot))/100)."%)");
- $ly += $fh+2;
- }
-
- header("Content-type: image/png");
-
- $imgFileName = "../temp/".time().".png";
- imagepng($img,$imgFileName);
- echo '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
- }
- $datLst = array(30, 10, 20, 20, 10, 20, 10, 20);
- $labLst = array("中国科技大学", "安徽理工大学", "清华大学", "北京大学", "南京大学", "上海大学", "河海大学", "中山大学");
- $clrLst = array(0x99ff00, 0xff6666, 0x0099ff, 0xff99ff, 0xffff99, 0x99ffff, 0xff3333, 0x009999);
-
- draw_img($datLst,$labLst,$clrLst);
- ?>
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