PHP中用GD绘制饼图
PHP中用GD绘制饼图，绘制的类见代码：
<span style="color: #008080"> 1</span> <span style="color: #0000ff">Class</span><span style="color: #000000"> Chart{</span><span style="color: #008080"> 2</span> <span style="color: #0000ff">private</span> <span style="color: #800080">$image</span>; <span style="color: #008000">//</span><span style="color: #008000"> 定义图像</span><span style="color: #008080"> 3</span> <span style="color: #0000ff">private</span> <span style="color: #800080">$title</span>; <span style="color: #008000">//</span><span style="color: #008000"> 定义标题</span><span style="color: #008080"> 4</span> <span style="color: #0000ff">private</span> <span style="color: #800080">$ydata</span>; <span style="color: #008000">//</span><span style="color: #008000"> 定义Y轴数据</span><span style="color: #008080"> 5</span> <span style="color: #0000ff">private</span> <span style="color: #800080">$xdata</span>; <span style="color: #008000">//</span><span style="color: #008000"> 定义X轴数据</span><span style="color: #008080"> 6</span> <span style="color: #0000ff">private</span> <span style="color: #800080">$color</span>; <span style="color: #008000">//</span><span style="color: #008000"> 定义条形图颜色</span><span style="color: #008080"> 7</span> <span style="color: #0000ff">private</span> <span style="color: #800080">$bgcolor</span>; <span style="color: #008000">//</span><span style="color: #008000"> 定义图片背景颜色</span><span style="color: #008080"> 8</span> <span style="color: #0000ff">private</span> <span style="color: #800080">$width</span>; <span style="color: #008000">//</span><span style="color: #008000"> 定义图片的宽</span><span style="color: #008080"> 9</span> <span style="color: #0000ff">private</span> <span style="color: #800080">$height</span>; <span style="color: #008000">//</span><span style="color: #008000"> 定义图片的长</span><span style="color: #008080"> 10</span> <span style="color: #008080"> 11</span> <span style="color: #008000">/*</span><span style="color: #008080"> 12</span> <span style="color: #008000"> * 构造函数 </span><span style="color: #008080"> 13</span> <span style="color: #008000"> * String title 图片标题</span><span style="color: #008080"> 14</span> <span style="color: #008000"> * Array xdata 索引数组，X轴数据</span><span style="color: #008080"> 15</span> <span style="color: #008000"> * Array ydata 索引数组，数字数组,Y轴数据</span><span style="color: #008080"> 16</span> <span style="color: #008000">*/</span><span style="color: #008080"> 17</span> <span style="color: #0000ff">function</span> __construct(<span style="color: #800080">$title</span>,<span style="color: #800080">$xdata</span>,<span style="color: #800080">$ydata</span><span style="color: #000000">) { </span><span style="color: #008080"> 18</span> <span style="color: #800080">$this</span>->title = <span style="color: #800080">$title</span><span style="color: #000000">;</span><span style="color: #008080"> 19</span> <span style="color: #800080">$this</span>->xdata = <span style="color: #800080">$xdata</span><span style="color: #000000">;</span><span style="color: #008080"> 20</span> <span style="color: #800080">$this</span>->ydata = <span style="color: #800080">$ydata</span><span style="color: #000000">;</span><span style="color: #008080"> 21</span> <span style="color: #800080">$this</span>->color = <span style="color: #0000ff">array</span>('#058DC7', '#50B432', '#ED561B', '#DDDF00', '#24CBE5', '#64E572', '#FF9655', '#FFF263', '#6AF9C4'<span style="color: #000000">);</span><span style="color: #008080"> 22</span> <span style="color: #000000"> }</span><span style="color: #008080"> 23</span> <span style="color: #008080"> 24</span> <span style="color: #008000">/*</span><span style="color: #008080"> 25</span> <span style="color: #008000"> * 公有方法，设置条形图的颜色 </span><span style="color: #008080"> 26</span> <span style="color: #008000"> * Array color 颜色数组,元素取值为'#058DC7'这种形式</span><span style="color: #008080"> 27</span> <span style="color: #008000">*/</span><span style="color: #008080"> 28</span> <span style="color: #0000ff">function</span> setBarColor(<span style="color: #800080">$color</span><span style="color: #000000">){</span><span style="color: #008080"> 29</span> <span style="color: #800080">$this</span>->color = <span style="color: #800080">$color</span><span style="color: #000000">;</span><span style="color: #008080"> 30</span> <span style="color: #000000"> }</span><span style="color: #008080"> 31</span> <span style="color: #008080"> 32</span> <span style="color: #008000">/*</span><span style="color: #008080"> 33</span> <span style="color: #008000"> * 绘制饼图</span><span style="color: #008080"> 34</span> <span style="color: #008000">*/</span><span style="color: #008080"> 35</span> <span style="color: #0000ff">function</span><span style="color: #000000"> mkPieChart() {</span><span style="color: #008080"> 36</span> <span style="color: #800080">$sum</span> = <span style="color: #008080">array_sum</span>(<span style="color: #800080">$this</span>->ydata); <span style="color: #008000">//</span><span style="color: #008000"> 获取ydata所有元素之和</span><span style="color: #008080"> 37</span> <span style="color: #800080">$start</span> = 0; <span style="color: #008000">//</span><span style="color: #008000"> 弧的开始角度</span><span style="color: #008080"> 38</span> <span style="color: #800080">$end</span> = 0; <span style="color: #008000">//</span><span style="color: #008000"> 弧的结束角度</span><span style="color: #008080"> 39</span> <span style="color: #800080">$pieWidth</span> = 300; <span style="color: #008000">//</span><span style="color: #008000"> 椭圆的长轴</span><span style="color: #008080"> 40</span> <span style="color: #800080">$pieHeight</span> = 220; <span style="color: #008000">//</span><span style="color: #008000"> 椭圆的短轴</span><span style="color: #008080"> 41</span> <span style="color: #800080">$space</span> = 40; <span style="color: #008000">//</span><span style="color: #008000"> 椭圆与小矩形的间距</span><span style="color: #008080"> 42</span> <span style="color: #800080">$margin</span> = 20; <span style="color: #008000">//</span><span style="color: #008000"> 图片的边距</span><span style="color: #008080"> 43</span> <span style="color: #800080">$recWidth</span> = 20; <span style="color: #008000">//</span><span style="color: #008000"> 小矩形的宽</span><span style="color: #008080"> 44</span> <span style="color: #800080">$recHeight</span> = 15; <span style="color: #008000">//</span><span style="color: #008000"> 小矩形的高</span><span style="color: #008080"> 45</span> <span style="color: #800080">$titleHeight</span> = 50; <span style="color: #008000">//</span><span style="color: #008000"> 标题区域的高</span><span style="color: #008080"> 46</span> <span style="color: #008000"> // 图片自适应宽与高</span><span style="color: #008080"> 47</span> <span style="color: #800080">$this</span>->width = <span style="color: #800080">$pieWidth</span> + <span style="color: #800080">$this</span>->arrayLengthMax(<span style="color: #800080">$this</span>->xdata)*10*4/3 + <span style="color: #800080">$space</span> + <span style="color: #800080">$recWidth</span> +<span style="color: #800080">$margin</span><span style="color: #000000">;</span><span style="color: #008080"> 48</span> <span style="color: #800080">$this</span>->height = ((<span style="color: #800080">$pieHeight</span> > <span style="color: #008080">count</span>(<span style="color: #800080">$this</span>->xdata)*25 ) ? <span style="color: #800080">$pieHeight</span> : <span style="color: #008080">count</span>(<span style="color: #800080">$this</span>->xdata)*25) + <span style="color: #800080">$titleHeight</span><span style="color: #000000">;</span><span style="color: #008080"> 49</span> <span style="color: #008000">//</span><span style="color: #008000"> 椭圆中心的坐标</span><span style="color: #008080"> 50</span> <span style="color: #800080">$cx</span> = <span style="color: #800080">$pieWidth</span>/2+<span style="color: #800080">$margin</span><span style="color: #000000">;</span><span style="color: #008080"> 51</span> <span style="color: #800080">$cy</span> = <span style="color: #800080">$pieHeight</span>/2+<span style="color: #800080">$titleHeight</span><span style="color: #000000">;</span><span style="color: #008080"> 52</span> <span style="color: #008080"> 53</span> <span style="color: #800080">$this</span>->image = imagecreatetruecolor(<span style="color: #800080">$this</span>->width ,<span style="color: #800080">$this</span>->height); <span style="color: #008000">//</span><span style="color: #008000"> 准备画布</span><span style="color: #008080"> 54</span> <span style="color: #800080">$this</span>->bgcolor = imagecolorallocate(<span style="color: #800080">$this</span>->image,255,255,255); <span style="color: #008000">//</span><span style="color: #008000"> 图片的背景颜色</span><span style="color: #008080"> 55</span> imagefill(<span style="color: #800080">$this</span>->image,0,0,<span style="color: #800080">$this</span>->bgcolor); <span style="color: #008000">//</span><span style="color: #008000"> 填充背景</span><span style="color: #008080"> 56</span> <span style="color: #008080"> 57</span> <span style="color: #008000"> // 设置条形图的颜色</span><span style="color: #008080"> 58</span> <span style="color: #800080">$color</span> = <span style="color: #0000ff">array</span><span style="color: #000000">();</span><span style="color: #008080"> 59</span> <span style="color: #0000ff">foreach</span>(<span style="color: #800080">$this</span>->color <span style="color: #0000ff">as</span> <span style="color: #800080">$col</span><span style="color: #000000">) {</span><span style="color: #008080"> 60</span> <span style="color: #800080">$col</span> = <span style="color: #008080">substr</span>(<span style="color: #800080">$col</span>,1,<span style="color: #008080">strlen</span>(<span style="color: #800080">$col</span>)-1<span style="color: #000000">);</span><span style="color: #008080"> 61</span> <span style="color: #800080">$red</span> = <span style="color: #008080">hexdec</span>(<span style="color: #008080">substr</span>(<span style="color: #800080">$col</span>,0,2<span style="color: #000000">));</span><span style="color: #008080"> 62</span> <span style="color: #800080">$green</span> = <span style="color: #008080">hexdec</span>(<span style="color: #008080">substr</span>(<span style="color: #800080">$col</span>,2,2<span style="color: #000000">));</span><span style="color: #008080"> 63</span> <span style="color: #800080">$blue</span> = <span style="color: #008080">hexdec</span>(<span style="color: #008080">substr</span>(<span style="color: #800080">$col</span>,4,2<span style="color: #000000">));</span><span style="color: #008080"> 64</span> <span style="color: #800080">$color</span>[] = imagecolorallocate(<span style="color: #800080">$this</span>->image ,<span style="color: #800080">$red</span>, <span style="color: #800080">$green</span>, <span style="color: #800080">$blue</span><span style="color: #000000">);</span><span style="color: #008080"> 65</span> <span style="color: #000000"> }</span><span style="color: #008080"> 66</span> <span style="color: #008080"> 67</span> <span style="color: #008000">//</span><span style="color: #008000"> 设置线段的颜色、字体的颜色、字体的路径</span><span style="color: #008080"> 68</span> <span style="color: #800080">$lineColor</span> = imagecolorallocate(<span style="color: #800080">$this</span>->image ,0xcc,0xcc,0xcc<span style="color: #000000">);</span><span style="color: #008080"> 69</span> <span style="color: #800080">$fontColor</span> = imagecolorallocate(<span style="color: #800080">$this</span>->image, 0x95,0x8f,0x8f<span style="color: #000000">);</span><span style="color: #008080"> 70</span> <span style="color: #800080">$fontPath</span> = 'font/simsun.ttc'<span style="color: #000000">;</span><span style="color: #008080"> 71</span> <span style="color: #008080"> 72</span> <span style="color: #008000">//</span><span style="color: #008000"> 绘制扇形弧 </span><span style="color: #008080"> 73</span> <span style="color: #0000ff">for</span>(<span style="color: #800080">$i</span> = 0; <span style="color: #800080">$i</span> < 10; <span style="color: #800080">$i</span>++<span style="color: #000000">) {</span><span style="color: #008080"> 74</span> <span style="color: #0000ff">foreach</span>(<span style="color: #800080">$this</span>->ydata <span style="color: #0000ff">as</span> <span style="color: #800080">$key</span> => <span style="color: #800080">$val</span><span style="color: #000000">) {</span><span style="color: #008080"> 75</span> <span style="color: #800080">$end</span> += 360*<span style="color: #800080">$val</span>/<span style="color: #800080">$sum</span><span style="color: #000000">;</span><span style="color: #008080"> 76</span> imagefilledarc(<span style="color: #800080">$this</span>->image,<span style="color: #800080">$cx</span>,<span style="color: #800080">$cy</span>-<span style="color: #800080">$i</span>,<span style="color: #800080">$pieWidth</span>,<span style="color: #800080">$pieHeight</span>, <span style="color: #800080">$start</span>,<span style="color: #800080">$end</span>,<span style="color: #800080">$color</span>[<span style="color: #800080">$key</span>%<span style="color: #008080">count</span>(<span style="color: #800080">$this</span>->color)],<span style="color: #000000">IMG_ARC_PIE); </span><span style="color: #008080"> 77</span> <span style="color: #800080">$start</span> = <span style="color: #800080">$end</span><span style="color: #000000">; </span><span style="color: #008080"> 78</span> <span style="color: #000000"> }</span><span style="color: #008080"> 79</span> <span style="color: #000000"> }</span><span style="color: #008080"> 80</span> <span style="color: #008080"> 81</span> <span style="color: #008000">//</span><span style="color: #008000"> 绘制小矩形及之后文字说明</span><span style="color: #008080"> 82</span> <span style="color: #800080">$x1</span> = <span style="color: #800080">$pieWidth</span>+<span style="color: #800080">$space</span><span style="color: #000000">;</span><span style="color: #008080"> 83</span> <span style="color: #800080">$y1</span> = <span style="color: #800080">$titleHeight</span><span style="color: #000000"> ;</span><span style="color: #008080"> 84</span> <span style="color: #0000ff">foreach</span>(<span style="color: #800080">$this</span>->ydata <span style="color: #0000ff">as</span> <span style="color: #800080">$key</span> => <span style="color: #800080">$val</span><span style="color: #000000">) {</span><span style="color: #008080"> 85</span> imagefilledrectangle(<span style="color: #800080">$this</span>->image,<span style="color: #800080">$x1</span>,<span style="color: #800080">$y1</span>,<span style="color: #800080">$x1</span>+<span style="color: #800080">$recWidth</span>,<span style="color: #800080">$y1</span>+<span style="color: #800080">$recHeight</span>,<span style="color: #800080">$color</span>[<span style="color: #800080">$key</span>%<span style="color: #008080">count</span>(<span style="color: #800080">$this</span>-><span style="color: #000000">color)]); </span><span style="color: #008080"> 86</span> imagettftext(<span style="color: #800080">$this</span>->image,10,0,<span style="color: #800080">$x1</span>+<span style="color: #800080">$recWidth</span>+5,<span style="color: #800080">$y1</span>+<span style="color: #800080">$recHeight</span>-2,<span style="color: #800080">$fontColor</span>,<span style="color: #800080">$fontPath</span>,<span style="color: #800080">$this</span>->xdata[<span style="color: #800080">$ke<div>本文#来源gaodai.ma#com搞##代!^码7网</div><pre>搞代gaodaima码
y]); 87 $y1 += $recHeight + 10; 88 } 89 90 // 绘画标题 91 $titleStart = ($this->width – 5.5*strlen($this->title))/2; 92 imagettftext($this->image,11,0,$titleStart,20,$fontColor,$fontPath,$this->title); 93 94 // 输出图片 95 header(“Content-Type:image/png”); 96 imagepng($this->image); 97 } 98 99 /*100 * 私有方法，求数组中元素长度最大的值 101 * Array arr 字符串数组，必须是汉字102 */103 private function arrayLengthMax($arr) {104 $length = 0;105 foreach($arr as $val) {106 $length = strlen($val) > $length ? strlen($val) : $length;107 }108 return $length/3;109 } 110 111 // 析构函数112 function __destruct(){113 imagedestroy($this->image);114 }115 }
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转载请注明原文链接：PHP顶用GD绘制饼图
转载请注明原文链接：PHP顶用GD绘制饼图
