pChart是一个开源的图表生成库，主要涉及3个Class：pChart.class, pData.class, pCache.class，可生成20多种简单或复杂的图表，支持PNG，JPG，GIF通用图片格式。数据源可以来自于Database，CSV，当然也可以手写。使用该程序PHP需要开启GD服务，先来看看pChart的工作流程：
主要分为三步：
下面看一个简单的柱状图表：
代码如下：
<span style="color: blue"><?php </span><span style="color: green">// Standard inclusions </span><span style="color: blue">include</span><span style="color: purple">(</span><span style="color: olive">"pChart/pData.class"</span><span style="color: purple">)</span>; <span style="color: blue">include</span><span style="color: purple">(</span><span style="color: olive">"pChart/pChart.class"</span><span style="color: purple">)</span>; <span style="color: green">// Dataset definition </span><span style="color: blue">$DataSet </span><span style="color: purple">= </span><span style="color: blue">new </span>pData; <span style="color: green">//图表数据 </span><span style="color: blue">$DataSet</span><span style="color: purple">-></span>AddPoint<span style="color: purple">(</span><span style="color: blue">array</span><span style="color: purple">(</span><span style="color: red">1</span><span style="color: purple">,</span><span style="color: red">4</span><span style="color: purple">,-</span><span style="color: red">3</span><span style="color: purple">,</span><span style="color: red">2</span><span style="color: purple">,-</span><span style="color: red">3</span><span style="color: purple">,</span><span style="color: red">3</span><span style="color: purple">,</span><span style="color: red">2</span><span style="color: purple">,</span><span style="color: red">1</span><span style="color: purple">,</span><span style="color: red">0</span><span style="color: purple">,</span><span style="color: red">7</span><span style="color: purple">,</span><span style="color: red">4</span><span style="color: purple">),</span><span style="color: olive">"Serie1"</span><span style="color: purple">)</span>; <span style="color: blue">$DataSet</span><span style="color: purple">-></span>AddPoint<span style="color: purple">(</span><span style="color: blue">array</span><span style="color: purple">(</span><span style="color: red">3</span><span style="color: purple">,</span><span style="color: red">3</span><span style="color: purple">,-</span><span style="color: red">4</span><span style="color: purple">,</span><span style="color: red">1</span><span style="color: purple">,-</span><span style="color: red">2</span><span style="color: purple">,</span><span style="color: red">2</span><span style="color: purple">,</span><span style="color: red">1</span><span style="color: purple">,</span><span style="color: red">0</span><span style="color: purple">,-</span><span style="color: red">1</span><span style="color: purple">,</span><span style="color: red">6</span><span style="color: purple">,</span><span style="color: red">3</span><span style="color: purple">),</span><span style="color: olive">"Serie2"</span><span style="color: purple">)</span>; <span style="color: blue">$DataSet</span><span style="color: purple">-></span>AddPoint<span style="color: purple">(</span><span style="color: blue">array</span><span style="color: purple">(</span><span style="color: red">4</span><span style="color: purple">,</span><span style="color: red">1</span><span style="color: purple">,</span><span style="color: red">2</span><span style="color: purple">,-</span><span style="color: red">1</span><span style="color: purple">,-</span><span style="color: red">4</span><span style="color: purple">,-</span><span style="color: red">2</span><span style="color: purple">,</span><span style="color: red">3</span><span style="color: purple">,</span><span style="color: red">2</span><span style="color: purple">,</span><span style="color: red">1</span><span style="color: purple">,</span><span style="color: red">2</span><span style="color: purple">,</span><span style="color: red">2</span><span style="color: purple">),</span><span style="color: olive">"Serie3"</span><span style="color: purple">)</span>; <span style="color: blue">$DataSet</span><span style="color: purple">-></span>AddAllSeries<span style="color: purple">()</span>; <span style="color: blue">$DataSet</span><span style="color: purple">-></span>SetAbsciseLabelSerie<span style="color: purple">()</span>; <span style="color: green">//数据图例 </span><span style="color: blue">$DataSet</span><span style="color: purple">-></span>SetSerieName<span style="color: purple">(</span><span style="color: olive">"Microsoft"</span><span style="color: purple">,</span><span style="color: olive">"Serie1"</span><span style="color: purple">)</span>; <span style="color: blue">$DataSet</span><span style="color: purple">-></span>SetSerieName<span style="color: purple">(</span><span style="color: olive">"IBM"</span><span style="color: purple">,</span><span style="color: olive">"Serie2"</span><span style="color: purple">)</span>; <span style="color: blue">$DataSet</span><span style="color: purple">-></span>SetSerieName<span style="color: purple">(</span><span style="color: olive">"Google"</span><span style="color: purple">,</span><span style="color: olive">"Serie3"</span><span style="color: purple">)</span>; <span style="color: green">// Initialise the graph </span><span style="color: blue">$Test </span><span style="color: purple">= </span><span style="color: blue">new </span>pChart<span style="color: purple">(</span><span style="color: red">700</span><span style="color: purple">,</span><span style="color: red">230</span><span style="color: purple">)</span>; <span style="color: green">//设置图表尺寸、样式 </span><span style="color: blue">$Test</span><span style="color: purple">-></span>setFontProperties<span style="color: purple">(</span><span style="color: olive">"Fonts/tahoma.ttf"</span><span style="color: purple">,</span><span style="color: red">8</span><span style="color: purple">)</span>; <span style="color: blue">$Test</span><span style="color: purple">-></span>setGraphArea<span style="color: purple">(</span><span style="color: red">50</span><span style="color: purple">,</span><span style="color: red">30</span><span style="color: purple">,</span><span style="color: red">680</span><span style="color: purple">,</span><span style="color: red">200</span><span style="color: purple">)</span>; <span style="color: blue">$Test</span><span style="color: purple">-></span>drawFilledRoundedRectangle<span style="color: purple">(</span><span style="color: red">7</span><span style="color: purple">,</span><span style="color: red">7</span><span style="color: purple">,</span><span style="color: red">693 <p align="left"></p> <div style="display:none;"> <span id="url" itemprop="url">http://www.bkjia.com/PHPjc/486322.html</span><span id="indexUrl" itemprop="indexUrl">www.bkjia.com</span><span id="isOriginal" itemprop="isOriginal">true</span><span id="isBasedOnUrl" itemprop="isBasedOnUrl">http://www.bkjia.com/PHPjc/486322.html</span><span id="genre" itemprop="genre">TechArticle</span><span id="description" itemprop="description">pChart是一个开源的图表生成库，主要涉及3个Class： pChart.class , pData.class , pCache.class ，可生成20多种简单或复杂的图表，支持PNG，JPG，GIF通用...</span> </div> <div class="art_confoot"></div> </span></span>
