php產生圖形（Libchart）執行個體_php執行個體

統計圖形就我們會常到的資料圖形了，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圖形產生類吧，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)
複製代碼 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);
?>

紅色字型為調用。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

我們的應用主原始碼如下：
複製代碼 代碼如下:
header("content-type:image/png");
require_once('libchart/classes/libchart.php');

$chart = new VerticalBarChart( 500 , 250 ) ; // 參數表示需要建立的映像的寬和高
$dataSet = new XYDataSet() ; // 執行個體化一個 XY 軸資料對象

// 為這個對象增加四組資料集合， Point 對象的第一個參數表示 X 軸座標，
// 第二個表示 Y 軸座標
$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 )) ;
// 把這個資料集合傳遞給繪圖物件
$chart -> setDataSet ( $dataSet ) ;
// 設定圖形的標題，並把它作為一個 png 檔案渲染
$chart -> setTitle ( "統計圖" ) ;

//$chart -> render ( "demo/generated/demo1.png" ) ;
// 這裡需要一個路徑和檔案名稱
//就這麼簡單一個像一樣美麗的柱狀圖就出來了
$chart -> render () ;
?>

標紅字的地方是為瞭解決中文亂碼的。
2、標題亂碼：
預設顯示中文是亂碼，這是由於編碼的原因，做如下修改：
首先，更改libchar/libchart/classes/view/chart/Chart.php，找到如下內容：
複製代碼 代碼如下:
public function setTitle($title) {
$this->plot->setTitle($title);
}

更改為：
複製代碼 代碼如下:
public function setTitle($title) {
$title = mb_convert_encoding($title, "html-entities","utf-8" );
$this->plot->setTitle($title);
}

第三步：就是上面某個部落格裡講到的：
1、自己寫的使用Libchart 庫組建圖表的php 檔案以utf-8編碼儲存
2、找幾個中文字型庫，比如華文行楷、宋體等等，複製到libchart fonts目錄下
3、修改libchart classes目錄下的text.php 檔案
第47、48行

複製代碼 代碼如下:
$this->fontCondensed = dirname(__FILE__) . "/../fonts/DejaVuSansCondensed.ttf";
$this->fontCondensedBold = dirname(__FILE__) . "/../fonts/DejaVuSansCondensed-Bold.ttf";

改為
複製代碼 代碼如下:
$this->fontCondensed = dirname(__FILE__) . "/../fonts/你找來的中文字型";
$this->fontCondensedBold = dirname(__FILE__) . "/../fonts/你找來的中文字型";

我修改的：
複製代碼 代碼如下:
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 這個檔案是我找的方正仿宋簡體字型檔，我把中文名字改成那個樣子了，其實不改也是可以的。

