统计图形就我们会常到的数据图形了，如果三个数组以图形显示或楼盘以图形走向我们都会要用到图形，下面我来介绍一个php libchart图形生成类吧，很用的有需要的朋友可参考。
简单全数字或英文的就可以直接使用下面类了(libchart类大家可自行百度下载)代码如下复制代码/*update by LeoIt's draw the pic of Sheet,and it will take all the num on the pic.*/require "./libchart/classes/libchart.php";class drawPic{var $chart;var $style;function drawPic($style="1",$width="500",$height="250"){$this->style=$style;if($style==1){//cylinder$this->chart = new VerticalBarChart($width,$height);}else if($style==2){//line$this->chart = new LineChart($width,$height);}else if($style==3){//Lump$this->chart = new PieChart($width,$height);}else{//cross$this->chart=new HorizontalBarChart($width,$height);}}function draw($obj){if($this->style==1||$this->style=="1"){//cylinder$dataSet = new XYDataSet() ;$this->chart->setTitle($obj->title);//title$arr=array();$arr=$obj->dataArray;foreach($arr as $key => $val){$dataSet->addPoint ( new Point($key,$val)) ;}$this->chart->setDataSet ( $dataSet ) ;$this->chart->render();}else if($this->style==2||$this->style=="2"){//line$this->chart->setTitle($obj->title);//title$arr=array();$arr=$obj->dataArray;$i=0;$dataSet = new XYSeriesDataSet();foreach($arr as $key => $val){$serie{$i}= new XYDataSet();foreach($val as $k => $v){$serie{$i}->addPoint(new Point($k,$v));}$dataSet->addSerie($key,$serie{$i});$i=$i+1;}$this->chart->setDataSet($dataSet);$this->chart->render();}else if($style==3){//Lump$dataSet = new XYDataSet() ;$this->chart->setTitle($obj->title);//title$arr=array();$arr=$obj->dataArray;foreach($arr as $key => $val){$dataSet->addPoint ( new Point($key."($val)",$val)) ;}$this->chart->setDataSet ( $dataSet ) ;$this->chart->render();}else{//cross$dataSet = new XYDataSet();$this->chart->setTitle($obj->title);//title$arr=array();$arr=$obj->dataArray;foreach($arr as $key => $val){$dataSet->addPoint ( new Point($key,$val)) ;}$this->chart->setDataSet($dataSet);$this->chart->render();}}}class kkk{};$n=new drawPic("4");//it will set 1 or 2 or 3 or 4$k=new kkk();$k->dataArray=array("2000"=>"30","2001"=>"40","2002"=>"50","2003"=>"60","2004"=>"70","2005"=>"80","20020"=>"90");//style==1 or style=2 or style=4//$k->dataArray=array("2000"=>"30","2001"=>"40","2002"=>"50","2003"=>"60","2004"=>"70","2005"=>"80","20020"=>"90");//style==3//$k->dataArray=array("yi"=>array("2000"=>"30","2001"=>"40","2002"=>"50","2004"=>"60"),"er"=>array("2003"=>"60","2004"=>"70","2005"=>"80","20020"=>"90"),"san"=>array("33"=>"12","45"=>"56","89"=>"45","86"=>"49"));//style==2 and the years will show first array to block.(it will be show 2000 2001 2002 2004)$k->title="The Sheet title";$n->draw($k);?>红色字体为调用。方法1，2，4为相同的数组。3为线性图，有可能有两条线或者多条线的比较（也可以单线）。
如果要使用中文可能会发现libchart中文乱码 了，下面找了一个办法立即学习“PHP免费学习笔记（深入）
”；
我们的应用主源代码如下：
代码如下复制代码header("content-type:image/png");require_once('libchart/classes/libchart.php');$chart = new VerticalBarChart( 500 , 250 ) ; // 参数表示需要创建的图像的宽和高$dataSet = new XYDataSet() ; // 实例化一个 XY 轴数据对象// 为这个对象增加四组数据集合， Point 对象的第一个参数表示 X 轴坐标，// 第二个表示 Y 轴坐标$str = '二月';$str = mb_convert_encoding($str, "html-entities","utf-8" );$dataSet -> addPoint ( new Point( "Jan 2005" , 273 )) ;$dataSet -> addPoint ( new Point( "$str" , 120 )) ;$dataSet -> addPoint ( new Point( "March 2005" , 442 )) ;$dataSet -> addPoint ( new Point( "April 2005" , 600 )) ;// 把这个数据集合传递给图形对象$chart -> setDataSet ( $dataSet ) ;// 设置图形的标题，并把它作为一个 png 文件渲染$chart -> setTitle ( "统计图" ) ;//$chart -> render ( "demo/generated/demo1.png" ) ;// 这里需要一个路径和文件名称//就这么简单一个像下图一样美丽的柱状图就出来了$chart -> render () ;?>标红字的地方是为了解决中文乱码的。
2、标题乱码：
默认显示中文是乱码，这是由于编码的原因，做如下修改：首先，更改libchar/libchart/classes/view/chart/Chart.php，找到如下内容：代码如下复制代码public function setTitle($title) {$this->plot->setTitle($title);}
更改为：
代码如下复制代码public function setTitle($title) {$title = mb_convert_encoding($title, "html-entities","utf-8" );$this->plot->setTitle($title);}第三步：就是上面某个博客里讲到的：1、自己写的使用Libchart 库生成图表的php 文件以utf-8编码保存2、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3、修改libchart classes目录下的text.php 文件第47、48行代码如下复制代码$this->fontCondensed = dirname(__FILE__) . "/../fonts/DejaVuSansCondensed.ttf";$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";
我修改的：
代码如下复制代码public function Text() {$baseDir = dirname(__FILE__) . "/../../../";// Free low-res fonts based on Bitstream Vera$this->fontCondensed = $baseDir . "fonts/FANGZHENGFANGSONG.ttf";$this->fontCondensedBold = $baseDir . "fonts/FANGZHENGFANGSONG.ttf";}FANGZHENGFANGSONG.ttf 这个文件是我找的方正仿宋简体字库，我把中文名字改成那个样子了，其实不改也是可以的。
主要是基本操作，然后又疑问的地方，按照上面说的做了，应该就是已经可以了，再次谢谢提供这些方法的热心网友，大家多多交流呀！