PHP in the use of GD implementation of the histogram, PHPGD implementation of the bar chart _php tutorial

PHP in the use of GD implementation of the bar chart, PHPGD implementation of the bar chart

PHP in the use of GD implementation of the histogram, wrote a histogram of their own class, on the code.

1 
 Php2  Classchart{3     Private $image;//Defining Images4     Private $title;//Defining Headings5     Private $ydata;//Defining y-axis data6     Private $xdata;//defining X-axis data7     Private $color;//Define a bar chart color8     Private $bgcolor;//define picture background color9     Private $width;//defines the width of the pictureTen     Private $height;//defines the length of the picture One      A     /* - * Constructor Function - * String Title picture title the * Array xdata indexed arrays, x-axis data - * Array ydata indexed arrays, numeric arrays, y-axis data -      */ -     function__construct ($title,$xdata,$ydata) {         +         $this->title =$title; -         $this->xdata =$xdata; +         $this->ydata =$ydata; A         $this->color =Array(' #058DC7 ', ' #50B432 ', ' #ED561B ', ' #DDDF00 ', ' #24CBE5 ', ' #64E572 ', ' #FF9655 ', ' #FFF263 ', ' #6AF9C4 '); at     } -      -     /* - * Public method, set the color of the bar chart - * An array of color arrays, with the element value ' #058DC7 ' This form -      */ in     functionSetbarcolor ($color){ -         $this->color =$color; to     } +      -     /* the * Public method, draw bar chart *      */ $     functionMkbarchart () {Panax Notoginseng         $ydataNum=$this->arraynum ($this->ydata);//get the number of data groupings -         $max=$this->arraymax ($this->ydata);//gets the maximum value of all rendered data the         $multi= ($max> 100)?$max/100:1;//If the maximum data is greater than 100, zoom out and get +         $barHeightMulti= 2.2;//scale of high bar scaling A         $barWidth= (16-2* ($ydataNum-1)) > 10? (16-2* ($ydataNum-1)): 10;//the width of the bar the         $barSpace= 16;//spacing between the bars +         $chartLeft= (1 +strlen($max)) *12;//set margin to the left of the picture -          $         $barY= 250;//Initialize the coordinates of y of a bar chart $ //Set the width and height of the picture -         $this->width = ($ydataNum*$barWidth+$barSpace)*Count($this->xdata) +$chartLeft;  -         $this->height = 300;  the         $this->image = Imagecreatetruecolor ($this->width,$this->height);//Prepare the canvas -         $this->bgcolor = Imagecolorallocate ($this->image,255,255,255);//background color of the pictureWuyi          the //Set the color of the bar chart -         $color=Array(); Wu         foreach($this->color as $col) { -             $col=substr($col, 1,strlen($col)-1); About             $red=Hexdec(substr($col, 0,2)); $             $green=Hexdec(substr($col, 2,2)); -             $blue=Hexdec(substr($col, 4,2)); -             $color[] = Imagecolorallocate ($this->image,$red,$green,$blue); -         } A          +         //set the color of the segment, the color of the font, the path to the font the         $lineColor= Imagecolorallocate ($this->image, 0XCC,0XCC,0XCC); -         $fontColor= Imagecolorallocate ($this->image, 0x95,0x8f,0x8f); $         $fontPath= ' FONT/SIMSUN.TTC '; the          theImagefill ($this->image,0,0,$this->bgcolor);//Painting Background the          the //Draw the short and left edges of the drawing -          for($i= 0;$i< 6;$i++ ) { inImageline ($this->image,$chartLeft-10,$barY-$barHeightMulti*$max/5/$multi*$i,$this->width,$barY-$barHeightMulti*$max/5/$multi*$i,$lineColor); theImagestring ($this->image,4,5,$barY-$barHeightMulti*$max/5/$multi*$i-8, Floor($max/5*$i),$fontColor); the         }         AboutImageline ($this->image,$chartLeft-10,30,$chartLeft-10,$barY,$lineColor); theImageline ($this->image,$this->width-1,30,$this->width-1,$barY,$lineColor); the          the         //the bar of a drawing drawing +         foreach($this->ydata as $key=$val) { -             if($ydataNum= = 1) { the                 //when a series of dataBayi                 $barX=$chartLeft+ 3 + ($barWidth+$barSpace)*$key; theImagefilledrectangle ($this->image,$barX,$barY-$barHeightMulti*$val/$multi,$barX+$barWidth,$barY,$color[$key%Count($this-color)]); the}ElseIf($ydataNum> 1) { -                 //multiple series of data when -                 $cbarSpace=$barSpace+$barWidth*($ydataNum-1); the                 foreach($val  as $ckey=$cval) { the                     $barX=$chartLeft+ 3 +$barWidth*$key+$ckey*($cbarSpace+$barWidth); theImagefilledrectangle ($this->image,$barX,$barY-$barHeightMulti*$cval/$multi,$barX+$barWidth,$barY,$color[$key%Count($this-color)]); the                 } -             } the              the         } the                 94         //The value of the x-coordinate of a drawing bar chart the         foreach($this->xdata as $key=$val) { the             $barX=$chartLeft+ ($ydataNum*$barWidth+$barSpace)*$key+$ydataNum*$barWidth/3; theImagettftext ($this->image,10,-45,$barX,$barY+15,$fontColor,$fontPath,$this->xdata[$key]);98         } About          -         //Painting title101         $titleStart= ($this->width-5.5*strlen($this->title))/2;102Imagettftext ($this->image,11,0,$titleStart, 20,$fontColor,$fontPath,$this-title);103         104         //Output Picture the         Header("Content-type:image/png");106Imagepng ($this-image);107     }108     109     /* the * Private method, when the array is a two-tuple array, the length of the statistic array111 * Array arr to do the statistics of the      */113     Private functionArraynum ($arr) { the          $num= 0; the          if(Is_array($arr)) { the             $num++;117              for($i= 0;$i<Count($arr);$i++){118                 if(Is_array($arr[$i])) {119                     $num=Count($arr); -                      Break;121                 }122             }123          }124          return $num; the     }126     127     /* - * Private method, calculate the depth of the array129 * array of arr arrays the      */131     Private functionArraydepth ($arr) { the          $num= 0;133          if(Is_array($arr)) {134             $num++;135              for($i= 0;$i<Count($arr);$i++){136                 if(Is_array($arr[$i])) {137                     $num+=$this->arraydepth ($arr[$i]);138                      Break;139                 } $             }141          }142          return $num;143     }144     145     /*146 * Private method, find the maximum value in a group147 * array of arr numbers148      */149      Private functionArrayMax ($arr) { Max         $depth=$this->arraydepth ($arr);151         $max= 0; the         if($depth= = 1) {153             Rsort($arr);154             $max=$arr[0]; 155}ElseIf($depth> 1) {156             foreach($arr  as $val) {157                 if(Is_array($val)) {158                     if($this->arraymax ($val) >$max) {159                         $max=$this->arraymax ($val); the                     }161}Else{                    162                     if($val>$max){163                         $max=$val;164                     }165                 }    166             }            167         }168         return $max;169     } the     171     functionArrayaver ($arr) {172         $aver=Array();173         foreach($arr  as $val) {174             if(Is_array($val)) {175                 $aver=Array_merge($aver,$val);176}Else{177                 $aver[] =$val;178             }179         } the         return Array_sum($aver)/Count($aver);181         182     }183     // Destructors184     function__destruct () {185Imagedestroy ($this-image);186     }187  }188？ >

This class can be implemented to draw a series of histogram and a series of histogram, as follows:

A column chart of a series

Histogram of multiple series

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