开源PHP图表生成函数pChart应用实例

$title = $floodgate['name'].'水位图';
include("lib/pData.php");//包含库文件,官方源文件是pData.class和pChart.class
include("lib/pChart.php");
//警戒线,填充一个等值数组
$warn = array_fill(0,count($datas['data']),$floodgate['warn']);
$DataSet = new pData;
$DataSet->AddPoint($datas['data'],"data");
$DataSet->AddPoint($warn,"warn");
//X坐标
$DataSet->AddPoint($datas['date'],"date");
$DataSet->AddSerie("warn");
$DataSet->AddSerie("data"); 
 
$DataSet->;SetAbsciseLabelSerie("date");
$DataSet->SetSerieName("水位","data");
$DataSet->;SetSerieName("警戒水位","warn");     
 
// 初始化图形
$Test = new pChart(720,250);
$Test->;drawGraphAreaGradient(90,90,90,90,TARGET_BACKGROUND);  
 
// 设置图标区域
$Test->setGraphArea(100,40,705,220);
$Test->setColorPalette(0,51,51,255); //线1颜色,数值线
$Test->setColorPalette(1,255,0,0);//线2颜色,警戒线
$Test->setFontProperties("lib/fonts/zhunyuan.ttf",10);  //自己下载的方正准圆简体
 
// Draw the SourceForge Rank graph
$DataSet->SetYAxisName("水位(m)");
$Test->drawScale($DataSet->GetData(),$DataSet->GetDataDescription(),SCALE_NORMAL,213,217,221,TRUE,0,1,FALSE,4);  
 
$Test->drawGraphAreaGradient(40,40,40,-50);
$Test->drawGrid(4,TRUE,230,230,230,10);
$Test->setShadowProperties(3,3,0,0,0,30,4);
//画曲线
$Test->drawCubicCurve($DataSet->GetData(),$DataSet->GetDataDescription());
$Test->clearShadow();
//这个不需要填充和标点,暂时Remov
$DataSet->;RemoveSerie("warn");
//填充曲线
$Test->drawFilledCubicCurve($DataSet->GetData(),$DataSet->GetDataDescription(),.1,30);
//标点
$Test-.drawPlotGraph($DataSet->GetData(),$DataSet->GetDataDescription(),3,2,255,255,255);
//画标示
$Test->drawLegend(0,30,$DataSet->GetDataDescription(),0,0,0,0,0,0,255,255,255,FALSE);
//输出标题
$Test->setFontProperties("lib/fonts/zhunyuan.ttf",18);
$Test->setShadowProperties(1,1,0,0,0);
$Test->drawTitle(0,0,$title,255,255,255,660,30,TRUE);
$Test>clearShadow();  
 
//用小字体标出每个点的数值
$Test->setFontProperties("lib/fonts/zhunyuan.ttf",8);
$Test->setColorPalette(0,204,204,255);
$Test->writeValues($DataSet->GetData(),$DataSet->GetDataDescription(),"data");
$Test->Stroke();

//$floodgate数组
Array
(
    [id] => 1
    [ip] => 19.127.200.30
    [name] => 横沥水闸（内河）
    [type] => 小（一）
    [river] => 西江
    [street] => 外海办事处
    [warn] => 3.80
)
//$datas数组
Array
(
    [date] => Array   //时间
        (
            [0] => 05-28 00:30
            [1] => 05-28 01:30
            [2] => 05-28 02:30
            [3] => 05-28 03:30
            [4] => 05-28 04:30
            [5] => 05-28 05:30
            [6] => 05-28 06:30
            [7] => 05-28 07:30
            [8] => 05-28 08:30
            [9] => 05-28 09:30
            [10] => 05-28 10:30
            [11] => 05-28 11:30
            [12] => 05-28 12:30
            [13] => 05-28 13:30
            [14] => 05-28 14:30
            [15] => 05-28 15:30
            [16] => 05-28 16:30
            [17] => 05-28 17:30
            [18] => 05-28 18:30
            [19] => 05-29 03:30
            [20] => 05-29 04:30
            [21] => 05-29 05:30
            [22] => 05-29 06:30
            [23] => 05-29 07:30
            [24] => 05-29 08:30
            [25] => 05-29 09:30
            [26] => 05-29 10:30
            [27] => 05-29 11:30
            [28] => 05-29 12:30
            [29] => 05-29 13:30
        )
 
    [data] => Array  //数据
        (
            [0] => 3.918
            [1] => 3.902
            [2] => 4.248
            [3] => 4.594
            [4] => 4.907
            [5] => 4.993
            [6] => 4.895
            [7] => 4.694
            [8] => 4.570
            [9] => 4.405
            [10] => 4.259
            [11] => 4.122
            [12] => 3.968
            [13] => 3.815
            [14] => 3.722
            [15] => 3.637
            [16] => 3.540
            [17] => 3.640
            [18] => 3.746
            [19] => 4.135
            [20] => 4.395
            [21] => 4.636
            [22] => 4.677
            [23] => 4.582
            [24] => 4.393
            [25] => 4.291
            [26] => 4.168
            [27] => 3.990
            [28] => 3.869
            [29] => 3.707
        )
)