Class Chart{

     private $image; // 定义图像

     private $title; // 定义标题

     private $ydata; // 定义Y轴数据

     private $xdata; // 定义X轴数据

     private $seriesName; // 定义每个系列数据的名称

     private $color; // 定义条形图颜色

     private $bgcolor; // 定义图片背景颜色

     private $width; // 定义图片的宽

     private $height; // 定义图片的长

     /*

      * 构造函数

      * String title 图片标题

      * Array xdata 索引数组，X轴数据

      * Array ydata 索引数组，数字数组,Y轴数据

      * Array series_name 索引数组，数据系列名称

      */

     function __construct($title,$xdata,$ydata,$seriesName) {

         $this->title = $title;

         $this->xdata = $xdata;

         $this->ydata = $ydata;

         $this->seriesName = $seriesName;

         $this->color = array('#058DC7', '#50B432', '#ED561B', '#DDDF00', '#24CBE5', '#64E572', '#FF9655', '#FFF263', '#6AF9C4');

     }

     /*

      * 公有方法，设置条形图的颜色

      * Array color 颜色数组,元素取值为'#058DC7'这种形式

      */

     function setBarColor($color){

         $this->color = $color;

     }

 /*

      * 绘制折线图

      */

     public function paintLineChart() {

         $ydataNum = $this->arrayNum($this->ydata); // 取得数据分组的个数

         $max = $this->arrayMax($this->ydata); // 取得所有呈现数据的最大值

         $max = ($max > 100)? $max : 100;

         $multi = $max/100; // 如果最大数据是大于100的则进行缩小处理

         $barHeightMulti = 2.2; // 条形高缩放的比例

         $lineWidth = 50;

         $chartLeft = (1+strlen($max))*12; // 设置图片左边的margin

         $lineY = 250; // 初始化条形图的Y的坐标

         // 设置图片的宽、高

         //$this->width = $lineWidth*count($this->xdata) + $chartLeft - $lineWidth/1.6; 

         $margin = 10; // 小矩形描述右边margin

         $recWidth = 20; // 小矩形的宽

         $recHeight = 15; // 小矩形的高

         $space = 20; // 小矩形与条形图的间距

         $tmpWidth = 0;

         // 设置图片的宽、高

         $lineChartWidth =  $lineWidth*count($this->xdata) + $chartLeft - $lineWidth/1.6 ;

         // 两个系列数据以上的加上小矩形的宽

         if($ydataNum > 1) {

             $tmpWidth = $this->arrayLengthMax($this->seriesName)*10*4/3 + $space + $recWidth + + $margin;

         }

         $this->width = $lineChartWidth + $tmpWidth; 

         $this->height = 300;

         $this->image = imagecreatetruecolor($this->width ,$this->height); // 准备画布

         $this->bgcolor = imagecolorallocate($this->image,255,255,255); // 图片的背景颜色

         // 设置条形图的颜色

         $color = array();

         foreach($this->color as $col) {

             $col = substr($col,1,strlen($col)-1);

             $red = hexdec(substr($col,0,2));

             $green = hexdec(substr($col,2,2));

             $blue = hexdec(substr($col,4,2));

             $color[] = imagecolorallocate($this->image ,$red, $green, $blue);

         }

         // 设置线段的颜色、字体的颜色、字体的路径

         $lineColor = imagecolorallocate($this->image ,0xcc,0xcc,0xcc);

         $fontColor = imagecolorallocate($this->image, 0x95,0x8f,0x8f);

         $fontPath = 'font/simsun.ttc';

         imagefill($this->image,0,0,$this->bgcolor); // 绘画背景

         // 绘画图的分短线与左右边线

         for($i = 0; $i < 6; $i++ ) {

             imageline($this->image,$chartLeft-10,$lineY-$barHeightMulti*$max/5/$multi*$i,$lineChartWidth,$lineY-$barHeightMulti*$max/5/$multi*$i,$lineColor);

             imagestring($this->image,4,5,$lineY-$barHeightMulti*$max/5/$multi*$i-8,floor($max/5*$i),$fontColor);

         }

         imageline($this->image,$chartLeft-10,30,$chartLeft-10,$lineY,$lineColor);

         imageline($this->image,$lineChartWidth-1,30,$lineChartWidth-1,$lineY,$lineColor);

         $style = array($lineColor,$lineColor,$lineColor,$lineColor,$lineColor,$this->bgcolor,$this->bgcolor,$this->bgcolor,$this->bgcolor,$this->bgcolor);

         imagesetstyle($this->image,$style);

         // 绘制折线图的分隔线（虚线）

         foreach($this->xdata as $key => $val) {

                 $lineX = $chartLeft + 3 + $lineWidth*$key;

                 imageline($this->image,$lineX,30,$lineX,$lineY,IMG_COLOR_STYLED);

         }

         // 绘画图的折线

         foreach($this->ydata as $key => $val) {

             if($ydataNum == 1) {

                 // 一个系列数据时

                 if($key == count($this->ydata) - 1 ) break;

                 $lineX = $chartLeft + 3 + $lineWidth*$key;

                 $lineY2 = $lineY-$barHeightMulti*($this->ydata[$key+1])/$multi;

                 // 画折线

                 if($key == count($this->ydata) - 2 ) {

                     imagefilledellipse($this->image,$lineX+$lineWidth,$lineY2,10,10,$color[0]);

                 }

                 imageline($this->image,$lineX,$lineY-$barHeightMulti*$val/$multi,$lineX+$lineWidth,$lineY2,$color[0]);

                 imagefilledellipse($this->image,$lineX,$lineY-$barHeightMulti*$val/$multi,10,10,$color[0]);

             }elseif($ydataNum > 1) {

                 // 多个系列的数据时

                 foreach($val as $ckey => $cval) {

                     if($ckey == count($val) - 1 ) break;

                     $lineX = $chartLeft + 3 + $lineWidth*$ckey;

                     $lineY2 = $lineY-$barHeightMulti*($val[$ckey+1])/$multi;

                     // 画折线

                     if($ckey == count($val) - 2 ) {

                         imagefilledellipse($this->image,$lineX+$lineWidth,$lineY2,10,10,$color[$key%count($this->color)]);

                     }

                     imageline($this->image,$lineX,$lineY-$barHeightMulti*$cval/$multi,$lineX+$lineWidth,$lineY2,$color[$key%count($this->color)]);

                     imagefilledellipse($this->image,$lineX,$lineY-$barHeightMulti*$cval/$multi,10,10,$color[$key%count($this->color)]);

                 }

             }

         }

         // 绘画条形图的x坐标的值

         foreach($this->xdata as $key => $val) {

             $lineX = $chartLeft + $lineWidth*$key + $lineWidth/3 - 20;

             imagettftext($this->image,10,-65,$lineX,$lineY+15,$fontColor,$fontPath,$this->xdata[$key]);

         }        

         // 两个系列数据以上时绘制小矩形及之后文字说明

         if($ydataNum > 1) {

             $x1 = $lineChartWidth + $space;

             $y1 = 20 ;

             foreach($this->seriesName as $key => $val) {

                 imagefilledrectangle($this->image,$x1,$y1,$x1+$recWidth,$y1+$recHeight,$color[$key%count($this->color)]);

                 imagettftext($this->image,10,0,$x1+$recWidth+5,$y1+$recHeight-2,$fontColor,$fontPath,$this->seriesName[$key]);

                 $y1 += $recHeight + 10;

             }

         }

         // 绘画标题

         $titleStart = ($this->width - 5.5*strlen($this->title))/2;

         imagettftext($this->image,11,0,$titleStart,20,$fontColor,$fontPath,$this->title);

         // 输出图片

         header("Content-Type:image/png");

         imagepng ( $this->image );

     }

     /*

      * 私有方法，当数组为二元数组时，统计数组的长度

      * Array arr 要做统计的数组

      */

     private function arrayNum($arr) {

          $num = 0;

          if(is_array($arr)) {

             $num++;

             for($i = 0; $i < count($arr); $i++){

                 if(is_array($arr[$i])) {

                     $num = count($arr);

                     break;

                 }

             }

          }

          return $num;

     }

     /*

      * 私有方法，计算数组的深度

      * Array arr 数组

      */

     private function arrayDepth($arr) {

          $num = 0;

          if(is_array($arr)) {

             $num++;

             for($i = 0; $i < count($arr); $i++){

                 if(is_array($arr[$i])) {

                     $num += $this->arrayDepth($arr[$i]);

                     break;

                 }

             }

          }

          return $num;

     }

     /*

      * 私有方法，找到一组中的最大值

      * Array arr 数字数组

      */

      private function arrayMax($arr) {

         $depth = $this->arrayDepth($arr);

         $max = 0;

         if($depth == 1) {

             rsort($arr);

             $max = $arr[0];

         }elseif($depth > 1) {

             foreach($arr as $val) {

                 if(is_array($val)) {

                     if($this->arrayMax($val) > $max) {

                         $max = $this->arrayMax($val);

                     }

                 }else{

                     if($val > $max){

                         $max = $val;

                     }

                 }

             }

         }

         return $max;

     }

     /*

      * 私有方法，求数组的平均值

      * Array arr 数字数组

      */

     function arrayAver($arr) {

         $aver = array();

         foreach($arr as $val) {

             if(is_array($val)) {

                 $aver = array_merge($aver,$val);

             }else{

                 $aver[] = $val;

             }

         }

         return array_sum($aver)/count($aver);

     }

     /*

      * 私有方法，求数组中元素长度最大的值

      * Array arr 字符串数组,必须是汉字

      */

     private function arrayLengthMax($arr) {

         $length = 0;

         foreach($arr as $val) {

             $length = strlen($val) > $length ? strlen($val) : $length;

         }

         return $length/3;

     } 

     // 析构函数

     function __destruct(){

         imagedestroy($this->image);

     }

  }

  $xdata = array('测试一','测试二','测试三','测试四','测试五','测试六','测试七','测试八','测试九');

  $ydata = array(array(29,30,45,54,65,45,76,23,54),array(89,60,90,23,35,45,56,23,56));

  $color = array();

  $seriesName = array("七月","八月");

  $title = "测试数据";

  $Img = new Chart($title,$xdata,$ydata,$seriesName);

7  $Img->paintLineChart();