PHP to use GD to draw pie chart, GD draw Pie _php Tutorial

PHP in the use of GD to draw pie chart, GD draw pie

PHP to use GD to draw a pie chart, the class to draw see code:

1 Classchart{2     Private $image;//Defining Images3     Private $title;//Defining Headings4     Private $ydata;//Defining y-axis data5     Private $xdata;//defining X-axis data6     Private $color;//Define a bar chart color7     Private $bgcolor;//define picture background color8     Private $width;//defines the width of the picture9     Private $height;//defines the length of the pictureTen      One     /* A * Constructor Function - * String Title picture title - * Array xdata indexed arrays, x-axis data the * Array ydata indexed arrays, numeric arrays, y-axis data -      */ -     function__construct ($title,$xdata,$ydata) {         -         $this->title =$title; +         $this->xdata =$xdata; -         $this->ydata =$ydata; +         $this->color =Array(' #058DC7 ', ' #50B432 ', ' #ED561B ', ' #DDDF00 ', ' #24CBE5 ', ' #64E572 ', ' #FF9655 ', ' #FFF263 ', ' #6AF9C4 '); A     } at      -     /* - * Public method, set the color of the bar chart - * An array of color arrays, with the element value ' #058DC7 ' This form -      */ -     functionSetbarcolor ($color){ in         $this->color =$color; -     } to      +     /* - * Draw pie chart the      */ *     functionMkpiechart () { $         $sum=Array_sum($this->ydata);//get the sum of all ydata elementsPanax Notoginseng         $start= 0;//Start angle of Arc -         $end= 0;//End angle of Arc the         $pieWidth= 300;//The long axis of an ellipse +         $pieHeight= 220;//the short axis of an ellipse A         $space= 40;//the spacing between the ellipse and the small rectangle the         $margin= 20;//the margins of the picture +         $recWidth= 20;//the width of the small rectangle -         $recHeight= 15;//the height of the small rectangle $         $titleHeight= 50;//the height of the title area $ //Image adaptive width and height -         $this->width =$pieWidth+$this->arraylengthmax ($this->xdata) *10*4/3 +$space+$recWidth+$margin; -         $this->height = (($pieHeight>Count($this->xdata) *25)?$pieHeight:Count($this->xdata) *25) +$titleHeight; the         //coordinates of the ellipse center -         $cx=$pieWidth/2+$margin;Wuyi         $cy=$pieHeight/2+$titleHeight; the          -         $this->image = Imagecreatetruecolor ($this->width,$this->height);//Prepare the canvas Wu         $this->bgcolor = Imagecolorallocate ($this->image,255,255,255);//background color of the picture -Imagefill ($this->image,0,0,$this->bgcolor);//Fill Background About          $ //Set the color of the bar chart -         $color=Array(); -         foreach($this->color as $col) { -             $col=substr($col, 1,strlen($col)-1); A             $red=Hexdec(substr($col, 0,2)); +             $green=Hexdec(substr($col, 2,2)); the             $blue=Hexdec(substr($col, 4,2)); -             $color[] = Imagecolorallocate ($this->image,$red,$green,$blue); $         } the          the         //set the color of the segment, the color of the font, the path to the font the         $lineColor= Imagecolorallocate ($this->image, 0XCC,0XCC,0XCC); the         $fontColor= Imagecolorallocate ($this->image, 0x95,0x8f,0x8f); -         $fontPath= ' FONT/SIMSUN.TTC '; in          the         //Draw Sector arcs the          for($i= 0;$i< 10;$i++) { About             foreach($this->ydata as $key=$val) { the                 $end+ = 360*$val/$sum; theImagefilledarc ($this->image,$cx,$cy-$i,$pieWidth,$pieHeight,$start,$end,$color[$key%Count($this->color)],Img_arc_pie);  the                 $start=$end;  +             } -         } the         Bayi         //draw small rectangles and later text descriptions the         $x 1=$pieWidth+$space; the         $y 1=$titleHeight ; -         foreach($this->ydata as $key=$val) { -Imagefilledrectangle ($this->image,$x 1,$y 1,$x 1+$recWidth,$y 1+$recHeight,$color[$key%Count($this-color)]);  theImagettftext ($this->image,10,0,$x 1+$recWidth+5,$y 1+$recHeight-2,$fontColor,$fontPath,$this->xdata[$key]); the             $y 1+=$recHeight+ 10;  the         } the          -         //Painting title the         $titleStart= ($this->width-5.5*strlen($this->title))/2; theImagettftext ($this->image,11,0,$titleStart, 20,$fontColor,$fontPath,$this-title); the         94         //Output Picture the         Header("Content-type:image/png"); theImagepng ($this-image); the     } 98      About     /* - * Private method to find the maximum length of the element in the array101 * Array of arr strings, must be kanji102      */103     Private functionArraylengthmax ($arr) {104         $length= 0; the         foreach($arr  as $val) {106             $length=strlen($val) >$length?strlen($val) :$length;107         }108         return $length/3;109     }  the     111     // Destructors the     function__destruct () {113Imagedestroy ($this-image); the     } the}

The test code is as follows:

1 $xdata Array (' Test one ', ' Test two ', ' Test three ', ' Test Four ', ' Test Five ', ' Test Six ', ' Test seven ', ' Test Eight ', ' Test Nine '); 2 $ydata Array (89,90,90,23,35,45,56,23,56); 3 $Img New Chart ($title,$xdata,$ydata); 4 $Img->mkpiechart ();

As follows:

http://www.bkjia.com/PHPjc/1063518.html www.bkjia.com true http://www.bkjia.com/PHPjc/1063518.html techarticle PHP using GD to draw a pie chart, GD draw pie in PHP with GD to draw pie chart, draw the class see code: 1 class chart{2 private $image;//definition Image 3 private $title;//define Title 4 Priv ...

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