Implementation code for php to generate pie chart effect_PHP tutorial

Many codes can be used to generate pie charts. The example we introduce today is a pie chart effect that generates statistical data based on the PHP gd library. Students in need can refer to it.

The code is as follows

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//+--------- ----------------+ //| pie3dfun.PHP//Public functions| //+--------------- ---------+ define("ANGLE_STEP", 5); //Define the angle step when drawing an elliptical arc function draw_getdarkcolor($img,$clr) //Find $clr Corresponding dark color { $rgb = imagecolorsforindex($img,$clr); return array($rgb["red"]/2,$rgb["green"]/2,$rgb ["blue"]/2); } function draw_getexy($a, $b, $d) //Find the point coordinates on the ellipse corresponding to angle $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) //Elliptic arc function { $n = ceil(($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) //Draw a sector { $n = ceil(($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, $clr) //3d sector { draw_sector($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 to index color { $R = ($clr>>16) & 0xff; $G = ($clr>>8)& 0xff; $B = ($clr) & 0xff; return imagecolorallocate($img, $R, $G, $B); } // Drawing main function and output image // $datLst is the data array, $datLst is the label array, $datLst is the color array // The dimensions of the above three arrays should be equal function draw_img($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);//Number of data items $w = 10+$a* 2; $h = 10+$b*2+$v+($fh+2)*$n; $img = imagecreate($w, $h); //Convert RGB to Index color for($i=0; $i<$n; $i++) $clrLst[$i] = draw_getindexcolor($img,$clrLst[$i]); $clrbk = imagecolorallocate($img, 0xff, 0xff, 0xff); $clrt = imagecolorallocate($img, 0x00, 0x00, 0x00); //Fill the background color imagefill($img, 0, 0, $clrbk); //Sum $tot = 0; for($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]/$tot*360; //Draw a round cake draw_sector3d($ img, $ox, $oy, $a, $b, $v, $sd, $ed, $clrLst[$i]); //$sd,$ed,$clrLst[$i]); //Draw label imagefilledrectangle($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 Graphics header("Content-type: image/png"); //Output the generated image $imgFileName = "../temp/".time().".png"; imagepng($img,$imgFileName); echo ''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''' } $datLst = array(30, 10, 20, 20, 10, 20, 10, 20); //data $labLst = array("University of Science and Technology of China", "Anhui University of Science and Technology", "Tsinghua University", "Peking University", "Nanjing University", "Shanghai University", "Hohai University", "Sun Yat-sen University"); //Tag $clrLst = array(0x99ff00, 0xff6666, 0x0099ff, 0xff99ff, 0xffff99, 0x99ffff, 0xff3333, 0x009999); //Draw draw_img($datLst,$labLst,$clrLst); ?>

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http://www.bkjia.com/PHPjc/444724.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/444724.htmlTechArticleGenerating a pie chart can be achieved with many codes. The example we introduce today is a generation based on the php gd library Students in need can refer to the pie chart effect of statistical data. Code...