libchart 在php中做统计图（饼状、柱状，线性）

来源：互联网发布：io域名注册编辑：程序博客网时间：2024/05/19 22:06

libchart的下载地址：http://naku.dohcrew.com/libchart/pages/download/

代码：

一、饼状图：

require_once ('/libchart/classes/libchart.php');

       $chart = new PieChart(500, 250);

       $dataSet = new XYDataSet();
       $dataSet->addPoint(new Point(mb_convert_encoding("苹果","html-entities","UTF-8"), 100));
       $dataSet->addPoint(new Point("香蕉", 155));//参数对应x轴和y轴坐标。
       $dataSet->addPoint(new Point("梨", 200));
       $dataSet->addPoint(new Point("橘子", 50));
       $chart->setDataSet($dataSet);

       $chart->setTitle("2012水果");
       $chart->render(TMPL_PATH.'default/Home/Chart/test.png');

二、柱状图

require_once ('/libchart/classes/libchart.php');

$chart = new VerticalBarChart(500, 250);

$dataSet = new XYDataSet();//实例化

       $dataSet->addPoint(new Point("2012-01", 50));
       $dataSet->addPoint(new Point("2012-02", 400));
       $dataSet->addPoint(new Point("2012-03", 632));
       $dataSet->addPoint(new Point("2012-04", 856));
       $dataSet->addPoint(new Point("2012-05", 1360));
       $dataSet->addPoint(new Point("2012-06", 1632));

       $chart->setDataSet($dataSet);

       $chart->setTitle("2012年苹果销量");
       $chart->render(TMPL_PATH.'default/Home/Chart/test3.png');

二、线性图

require_once ('/libchart/classes/libchart.php');

        $chart = new LineChart(500, 250);

       $serie1 = new XYDataSet();
       $serie1->addPoint(new Point("2012-01", 1054));
       $serie1->addPoint(new Point("2012-02", 966));
       $serie1->addPoint(new Point("2012-03", 800));
       $serie1->addPoint(new Point("2012-04", 522));
       $serie1->addPoint(new Point("2012-05", 300));
       $serie1->addPoint(new Point("2012-06", 111));

       $serie2 = new XYDataSet();
       $serie2->addPoint(new Point("2012-01", 50));
       $serie2->addPoint(new Point("2012-02", 400));
       $serie2->addPoint(new Point("2012-03", 632));
       $serie2->addPoint(new Point("2012-04", 856));
       $serie2->addPoint(new Point("2012-05", 1360));
       $serie2->addPoint(new Point("2012-06", 1632));


       $dataSet = new XYSeriesDataSet();
       $dataSet->addSerie("梨", $serie1);
       $dataSet->addSerie("苹果", $serie2);
       $chart->setDataSet($dataSet);
       $chart->setTitle("2012年苹果和梨的销量");
       $chart->render(TMPL_PATH.'default/Home/Chart/test2.png');

关于中文乱码问题：

1、找几个中文字体库，比如华文行楷、宋体等等，复制到libchart\fonts目录下
2、修改libchart \classes目录下的text.php文件

$this->fontCondensed = dirname(__FILE__) . "/../fonts/DejaVuSansCondensed.ttf";
$this->fontCondensedBold = dirname(__FILE__) . "/../fonts/DejaVuSansCondensed-Bold.ttf";

改为

$this->fontCondensed = dirname(__FILE__) . "/../fonts/你找来的中文字体";
$this->fontCondensedBold = dirname(__FILE__) . "/../fonts/你找来的中文字体";

我的实践告诉我以上这两步就可以解决乱码问题

网上参考资料说解决中文乱码需要如上面代码中的“ $dataSet->addPoint(new Point(mb_convert_encoding("苹果","html-entities","UTF-8"), 100));” 。我的实践中是不需要。

生成的图片上的文字太小：

libchart/classes/view/text/Text.php中方法printText（），把$fontSize 变量改大一些即可。