使用pchart創建的圖表會給出超時

對於pchart來說我是新手，我從mysql表中創建圖表時遇到了問題（可能是我錯過了）。我想要的是根據我選擇的項目繪製一行圖表。這隻有一次，然後每次我嘗試再次運行腳本時，apache（我使用的是apache2）會給出超時並使用「top」檢查服務器，但apache使用100％的cpu使用率。某些時候，圖表創建了一些時間，它只是保持100％的CPU使用率，並且什麼都不做。如果我使用「autoOutput」方法創建.png圖像，最後一個錯誤表示圖像無法顯示，因爲它包含錯誤，但使用「渲染」圖表創建，但有時候正如我解釋的那樣。以下是我的代碼，希望有人能給我點亮。使用pchart創建的圖表會給出超時

<?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"); 
?>

來源

2014-06-18 Javier Alarcon

那麼，它的工作通過這樣做：

我搬出while循環的所有以下幾點：

$MyData->addPoints($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');

，並在結束時，我改變了

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

並添加此代替：

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

我不得不排序一點點我試圖繪製的信息，但導致100％CPU使用率的問題得到解決並出現了圖表。這真的是我的第一步到PHP，我很抱歉所有的混亂在這裏。希望這有助於某人。

來源

2014-09-29 05:04:22

使用pchart創建的圖表會給出超時

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