php生成圖形（Libchart）實例

2024-09-04 11:46:56

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統計圖形就我們會常到的數據圖形了，如果三個數組以圖形顯示或樓盤以圖形走向我們都會要用到圖形，下面介紹一個php LIbchart圖形生成類.

統計圖形就我們會常到的數據圖形了，如果三個數組以圖形顯示或樓盤以圖形走向我們都會要用到圖形，下面我來介紹一個php LIbchart圖形生成類吧，很用的有需要的朋友可參考。

簡單全數字或英文的就可以直接使用下面類了(libchart類大家可自行百度下載),代碼如下:

<?

/*

  update by Leo

  It'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);

?>

紅色字體為調用。方法1，2，4為相同的數組。3為線性圖，有可能有兩條線或者多條線的比較（也可以單線）。

如果要使用中文可能會發現libchart中文亂碼了，下面找了一個辦法

我們的應用主源代碼如下：

<?php

   header("content-type:image/png");

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

   $chart = new VerticalBarChart( 500 , 250 ) ; // 參數表示需要創建的圖像的寬和高

   $dataSet = new XYDataSet() ; // 實例化一個 XY 軸數據對象

     // 為這個對象增加四組數據集合， Point 對象的第一個參數表示 X 軸坐標，

// 第二個表示 Y 軸坐標

   $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 )) ;

     // 把這個數據集合傳遞給圖形對象

    $chart -> setDataSet ( $dataSet ) ;

    // 設置圖形的標題，并把它作為一個 png 文件渲染

    $chart -> setTitle ( "統計圖" ) ;

    //$chart -> render ( "demo/generated/demo1.png" ) ;

    // 這里需要一個路徑和文件名稱

    //就這么簡單一個像下圖一樣美麗的柱狀圖就出來了

    $chart -> render () ;

?>

標紅字的地方是為了解決中文亂碼的。

2、標題亂碼：

默認顯示中文是亂碼，這是由于編碼的原因，做如下修改：

首先，更改libchar/libchart/classes/view/chart/Chart.php，找到如下內容：

public function setTitle($title) {

$this->plot->setTitle($title);

}

更改為：

public function setTitle($title) {

$title = mb_convert_encoding($title, "html-entities","utf-8" );

$this->plot->setTitle($title);

}

第三步：就是上面某個博客里講到的：

1、自己寫的使用Libchart 庫生成圖表的php 文件以utf-8編碼保存

2、找幾個中文字體庫，比如華文行楷、宋體等等，復制到libchart fonts目錄下

3、修改libchart classes目錄下的text.php 文件

第47、48行,代碼如下:

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

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

改為代碼如下:

$this->fontCondensed = dirname(__FILE__) . "/../fonts/你找來的中文字體";

$this->fontCondensedBold = dirname(__FILE__) . "/../fonts/你找來的中文字體";

我修改的代碼如下:

public function Text() {

    $baseDir = dirname(__FILE__) . "/../../../";

    // Free low-res fonts based on Bitstream Vera <http://dejavu.sourceforge.net/wiki/>

   $this->fontCondensed = $baseDir . "fonts/FANGZHENGFANGSONG.ttf";

    $this->fontCondensedBold = $baseDir . "fonts/FANGZHENGFANGSONG.ttf";

   }