# PHP Generate pie chart Effect implementation Code _php tutorial

Source: Internet
Author: User
Generate pie chart A lot of code can be implemented, today we introduced this example is based on a PHP GD library to generate statistical data of the pie chart effect, the need for students can refer to.
 The code is as follows Copy Code //+------------------------+//| Pie3dfun. php//Common Functions |//+------------------------+Define ("Angle_step", 5); Defines the angle step when drawing an elliptical arcfunction Draw_getdarkcolor (\$img, \$CLR)//\$CLR the corresponding dark color{\$rgb = Imagecolorsforindex (\$img, \$CLR);return Array (\$rgb ["Red"]/2, \$rgb ["Green"]/2, \$rgb ["Blue"]/2);}function draw_getexy (\$a, \$b, \$d)//\$d point coordinates on the ellipse corresponding to the angle{\$d = Deg2rad (\$d);Return Array (round (\$a *cos (\$d)), round (\$b *sin (\$d)));}function Draw_arc (\$img, \$ox, \$oy, \$a, \$b, \$SD, \$ed, \$CLR)//Elliptical arc function{\$n = Ceil ((\$ed-\$SD)/angle_step);\$d = \$SD;List (\$x 0, \$y 0) = 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, \$x 0+ \$ox, \$y 0+ \$oy, \$x + \$ox, \$y + \$oy, \$CLR);\$x 0 = \$x;\$y 0 = \$y;}}function Draw_sector (\$img, \$ox, \$oy, \$a, \$b, \$SD, \$ed, \$CLR)//Draw slices{\$n = Ceil ((\$ed-\$SD)/angle_step);\$d = \$SD;List (\$x 0, \$y 0) = draw_getexy (\$a, \$b, \$d);Imageline (\$img, \$x 0+ \$ox, \$y 0+ \$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, \$x 0+ \$ox, \$y 0+ \$oy, \$x + \$ox, \$y + \$oy, \$CLR);\$x 0 = \$x;\$y 0 = \$y;}Imageline (\$img, \$x 0+ \$ox, \$y 0+ \$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 fan{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)//RBG goto Index Color{\$R = (\$clr >>16) & 0xFF;\$G = (\$clr >>8) & 0xFF;\$B = (\$CLR) & 0xFF;Return Imagecolorallocate (\$img, \$R, \$G, \$B);}Draw the main function and output the picture\$datLst as an array of data, \$datLst as an array of labels, \$datLst as an array of colorsThe dimensions of the above three arrays should be equalfunction 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);//number of data items\$w = \$a\$h = \$b *2+ \$v + (\$fh +2) * \$n;\$img = Imagecreate (\$w, \$h);Turn RGB to indexed colorfor (\$i =0; \$i < \$n; \$i + +)\$clrLst [\$i] = Draw_getindexcolor (\$img, \$clrLst [\$i]);\$CLRBK = Imagecolorallocate (\$img, 0xFF, 0xFF, 0xff);\$CLRT = Imagecolorallocate (\$img, 0x00, 0x00, 0x00);Fill background colorImagefill (\$img, 0, 0, \$CLRBK);Sum\$tot = 0;for (\$i =0; \$i < \$n; \$i + +)\$tot + = \$datLst [\$i];\$SD = 0;\$ed = 0; 333\$ly = \$b *2+ \$v;for (\$i =0; \$i < \$n; \$i + +){\$SD = \$ed;\$ed + = \$datLst [\$i]/\$tot *360;Draw a round cakeDraw_sector3d (\$img, \$ox, \$oy, \$a, \$b, \$v, \$SD, \$ed, \$clrLst [\$i]); \$SD, \$ed, \$clrLst [\$i]);Draw LabelsImagefilledrectangle (\$img, 5, \$ly, 5+ \$fw, \$ly + \$fh, \$clrLst [\$i]);Imagerectangle (\$img, 5, \$ly, 5+ \$fw, \$ly + \$fh, \$CLRT);Imagestring (\$img, \$font, 5+2* \$fw, \$ly, \$labLst [\$i]. ":". \$datLst [\$i]. " (". (Round (10000* (\$datLst [\$i]/\$tot))/100). "%)", \$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;}Output graphicsHeader ("Content-type:image/png");Output the resulting picture\$imgFileName = ". /temp/". Time ().". PNG ";Imagepng (\$img, \$imgFileName);"" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" ""}\$datLst = Array (30, 10, 20, 20, 10, 20, 10, 20); Data\$labLst = Array ("China University of Science and Technology", "Anhui Polytechnic University", "Tsinghua University", "Peking University", "Nanjing University", "Shanghai University", "Hohai Univ.", "Zhongshan University"); Label\$clrLst = Array (0x99ff00, 0xff6666, 0x0099ff, 0xff99ff, 0xffff99, 0x99ffff, 0xff3333, 0x009999);DrawingDraw_img (\$datLst, \$labLst, \$clrLst);?>

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http://www.bkjia.com/PHPjc/444724.html www.bkjia.com true http://www.bkjia.com/PHPjc/444724.html techarticle Generate pie chart A lot of code can be implemented, today we introduced this example is based on a PHP GD library to generate statistical data of the pie chart effect, the need for students can refer to. Code ...

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