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PHP顶用GD绘制饼图

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Jun 13, 2016 pm 12:26 PM

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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> $i++<span style="color: #000000;">) {</span><span style="color: #008080;"> 74</span>             <span style="color: #0000ff;">foreach</span>(<span style="color: #800080;">$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;">$key</span><span style="color: #000000;">]);</span><span style="color: #008080;"> 87</span>             <span style="color: #800080;">$y1</span> += <span style="color: #800080;">$recHeight</span> + 10<span style="color: #000000;">;            </span><span style="color: #008080;"> 88</span> <span style="color: #000000;">        }</span><span style="color: #008080;"> 89</span>         <span style="color: #008080;"> 90</span>         <span style="color: #008000;">//</span><span style="color: #008000;"> 绘画标题</span><span style="color: #008080;"> 91</span>         <span style="color: #800080;">$titleStart</span> = (<span style="color: #800080;">$this</span>->width - 5.5*<span style="color: #008080;">strlen</span>(<span style="color: #800080;">$this</span>->title))/2<span style="color: #000000;">;</span><span style="color: #008080;"> 92</span>         imagettftext(<span style="color: #800080;">$this</span>->image,11,0,<span style="color: #800080;">$titleStart</span>,20,<span style="color: #800080;">$fontColor</span>,<span style="color: #800080;">$fontPath</span>,<span style="color: #800080;">$this</span>-><span style="color: #000000;">title);</span><span style="color: #008080;"> 93</span>         <span style="color: #008080;"> 94</span>         <span style="color: #008000;">//</span><span style="color: #008000;"> 输出图片</span><span style="color: #008080;"> 95</span>         <span style="color: #008080;">header</span>("Content-Type:image/png"<span style="color: #000000;">);</span><span style="color: #008080;"> 96</span>         imagepng(<span style="color: #800080;">$this</span>-><span style="color: #000000;">image);</span><span style="color: #008080;"> 97</span> <span style="color: #000000;">    } </span><span style="color: #008080;"> 98</span>     <span style="color: #008080;"> 99</span>     <span style="color: #008000;">/*</span><span style="color: #008080;">100</span> <span style="color: #008000;">     * 私有方法，求数组中元素长度最大的值 </span><span style="color: #008080;">101</span> <span style="color: #008000;">     * Array arr 字符串数组，必须是汉字</span><span style="color: #008080;">102</span>      <span style="color: #008000;">*/</span><span style="color: #008080;">103</span>     <span style="color: #0000ff;">private</span> <span style="color: #0000ff;">function</span> arrayLengthMax(<span style="color: #800080;">$arr</span><span style="color: #000000;">) {</span><span style="color: #008080;">104</span>         <span style="color: #800080;">$length</span> = 0<span style="color: #000000;">;</span><span style="color: #008080;">105</span>         <span style="color: #0000ff;">foreach</span>(<span style="color: #800080;">$arr</span> <span style="color: #0000ff;">as</span> <span style="color: #800080;">$val</span><span style="color: #000000;">) {</span><span style="color: #008080;">106</span>             <span style="color: #800080;">$length</span> = <span style="color: #008080;">strlen</span>(<span style="color: #800080;">$val</span>) > <span style="color: #800080;">$length</span> ? <span style="color: #008080;">strlen</span>(<span style="color: #800080;">$val</span>) : <span style="color: #800080;">$length</span><span style="color: #000000;">;</span><span style="color: #008080;">107</span> <span style="color: #000000;">        }</span><span style="color: #008080;">108</span>         <span style="color: #0000ff;">return</span> <span style="color: #800080;">$length</span>/3<span style="color: #000000;">;</span><span style="color: #008080;">109</span> <span style="color: #000000;">    } </span><span style="color: #008080;">110</span>     <span style="color: #008080;">111</span>     <span style="color: #008000;">//</span><span style="color: #008000;"> 析构函数</span><span style="color: #008080;">112</span>     <span style="color: #0000ff;">function</span><span style="color: #000000;"> __destruct(){</span><span style="color: #008080;">113</span>         imagedestroy(<span style="color: #800080;">$this</span>-><span style="color: #000000;">image);</span><span style="color: #008080;">114</span> <span style="color: #000000;">    }</span><span style="color: #008080;">115</span>  }

测试代码如下：

<span style="color: #008080;">1</span> <span style="color: #800080;">$xdata</span> = <span style="color: #0000ff;">array</span>('测试一','测试二','测试三','测试四','测试五','测试六','测试七','测试八','测试九'<span style="color: #000000;">);</span><span style="color: #008080;">2</span> <span style="color: #800080;">$ydata</span> = <span style="color: #0000ff;">array</span>(89,90,90,23,35,45,56,23,56<span style="color: #000000;">);</span><span style="color: #008080;">3</span> <span style="color: #800080;">$Img</span> = <span style="color: #0000ff;">new</span> Chart(<span style="color: #800080;">$title</span>,<span style="color: #800080;">$xdata</span>,<span style="color: #800080;">$ydata</span><span style="color: #000000;">);</span><span style="color: #008080;">4</span> <span style="color: #800080;">$Img</span>->mkPieChart();

效果图如下：

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Explain secure password hashing in PHP (e.g., password_hash, password_verify). Why not use MD5 or SHA1?Apr 17, 2025 am 12:06 AM

In PHP, password_hash and password_verify functions should be used to implement secure password hashing, and MD5 or SHA1 should not be used. 1) password_hash generates a hash containing salt values to enhance security. 2) Password_verify verify password and ensure security by comparing hash values. 3) MD5 and SHA1 are vulnerable and lack salt values, and are not suitable for modern password security.

PHP: An Introduction to the Server-Side Scripting LanguageApr 16, 2025 am 12:18 AM

PHP is a server-side scripting language used for dynamic web development and server-side applications. 1.PHP is an interpreted language that does not require compilation and is suitable for rapid development. 2. PHP code is embedded in HTML, making it easy to develop web pages. 3. PHP processes server-side logic, generates HTML output, and supports user interaction and data processing. 4. PHP can interact with the database, process form submission, and execute server-side tasks.

PHP and the Web: Exploring its Long-Term ImpactApr 16, 2025 am 12:17 AM

PHP has shaped the network over the past few decades and will continue to play an important role in web development. 1) PHP originated in 1994 and has become the first choice for developers due to its ease of use and seamless integration with MySQL. 2) Its core functions include generating dynamic content and integrating with the database, allowing the website to be updated in real time and displayed in personalized manner. 3) The wide application and ecosystem of PHP have driven its long-term impact, but it also faces version updates and security challenges. 4) Performance improvements in recent years, such as the release of PHP7, enable it to compete with modern languages. 5) In the future, PHP needs to deal with new challenges such as containerization and microservices, but its flexibility and active community make it adaptable.

Why Use PHP? Advantages and Benefits ExplainedApr 16, 2025 am 12:16 AM

The core benefits of PHP include ease of learning, strong web development support, rich libraries and frameworks, high performance and scalability, cross-platform compatibility, and cost-effectiveness. 1) Easy to learn and use, suitable for beginners; 2) Good integration with web servers and supports multiple databases; 3) Have powerful frameworks such as Laravel; 4) High performance can be achieved through optimization; 5) Support multiple operating systems; 6) Open source to reduce development costs.

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