Question

我是pchart的新手，我在从mysql表创建图表时遇到问题（可能是我错过的）。我想要的只是图表一行，取决于我将选择的项目。这只工作了一次，然后每当我再次尝试运行脚本时，apache（我正在使用apache2）给出超时并使用“top”检查服务器，进程apache使用100％的cpu使用率。有时候创建图表有时会使用100％的cpu使用而不做任何事情。如果我使用“autoOutput”方法在最后创建.png图像，则错误表示图像无法显示，因为它包含错误但使用“渲染”图表已创建，但有时我正在解释。以下是我的代码，希望有人能说清楚。

<?php
    /* pChart library inclusions */
     include("../../Library/class/pData.class.php");
     include("../../Library/class/pDraw.class.php");
     include("../../Library/class/pImage.class.php");
     include "../../connection.php";
    // Values from List.php
    $Selected=$_POST['Selection'];
    $MyData = new pData();  
    /* QUERY FOR THE CHART */
    $Requete = "SELECT * FROM table WHERE Sector = '$Selected' LIMIT 0 , 30";
    $Result  = mysql_query($Requete,$db)or die(mysql_error());
    while($row = mysql_fetch_array($Result))
     {
      $Sector = $row["Sector"];
      $Current_reading = $row["Current_reading"];
      $Old_Reading = $row['Old_reading'];
      $Month_Consumption = $row['Month_Consumption'];
      $Current_reading = $row['Current_reading'];
      $DM = $row['DM'];
      $FP = $row['FP'];
      $Cost = $row['Cost_KWh_$90.0000'];  


      $MyData->addPoints($Current_reading,'Current_reading');
      $MyData->addPoints($Old_Reading,'Old_reading');
      $MyData->addPoints($Month_Consumption,'Month_Consumption');
      $MyData->addPoints($DM,'DM');
      $MyData->addPoints($FP,'FP');
      $MyData->addPoints($Cost,'Cost_KWh_$90.0000');

     }
       /* Save the data in the pData array */
      $MyData->setAbscissa("Consumos_de");
      $MyData->setAbscissaName('February 2014');
      $MyData->setSerieDescription($Sector,"Sectores");
      $MyData->setAxisName(0,"Kw");  

     /* Create the pChart object */
     $myPicture = new pImage(800,230,$MyData);
     $myPicture->drawGradientArea(0,0,800,230,DIRECTION_VERTICAL,array("StartR"=>240,"StartG"=>240,"StartB"=>240,"EndR"=>180,"EndG"=>180,"EndB"=>180,"Alpha"=>100));
     $myPicture->drawGradientArea(0,0,800,230,DIRECTION_HORIZONTAL,array("StartR"=>240,"StartG"=>240,"StartB"=>240,"EndR"=>180,"EndG"=>180,"EndB"=>180,"Alpha"=>20));
     $myPicture->setFontProperties(array("FontName"=>"../../Library/fonts/verdana.ttf","FontSize"=>8));

     /* Draw the scale  */
     $myPicture->setGraphArea(50,30,780,200);
     $myPicture->drawScale(array("CycleBackground"=>TRUE,"DrawSubTicks"=>TRUE,"GridR"=>0,"GridG"=>0,"GridB"=>0,"GridAlpha"=>10));

     /* Turn on shadow computing */ 
     $myPicture->setShadow(TRUE,array("X"=>1,"Y"=>1,"R"=>0,"G"=>0,"B"=>0,"Alpha"=>10));

     /* Draw the chart */
     $settings = array("Gradient"=>TRUE,"DisplayPos"=>LABEL_POS_INSIDE,"DisplayValues"=>TRUE,"DisplayR"=>255,"DisplayG"=>255,"DisplayB"=>255,"DisplayShadow"=>TRUE,"Surrounding"=>10);
     $myPicture->drawBarChart($settings);

     /* Write the chart legend */
     $myPicture->drawLegend(680,12,array("Style"=>LEGEND_BORDER,"Mode"=>LEGEND_VERTICAL));

     /* Render the picture (choose the best way) */
     $myPicture->Render("/var/www/images/YourGraph.png");
?>

Answer 1

嗯，这样做有用：

我从while循环中移出了以下所有内容：

$MyData->addPoints($Current_reading,'Current_reading');
$MyData->addPoints($Old_Reading,'Old_reading');
$MyData->addPoints($Month_Consumption,'Month_Consumption');
$MyData->addPoints($DM,'DM');
$MyData->addPoints($FP,'FP');
$MyData->addPoints($Cost,'Cost_KWh_$90.0000');

最后我改变了

$myPicture->Render("/var/www/images/YourGraph.png");

并添加了这个：

$myPicture->autoOutput("YourChart.png");

我不得不对我试图绘制的信息进行排序，但是导致100％CPU使用率的问题已经解决，图表出现了。这是我PHP的第一步，对不起这里的所有烂摊子。希望这对某人有帮助。

使用pchart创建的图表可以缩短时间

1 个答案: