在pDraw中划分为零php类

-1

我试图创建一个PHP脚本，它可以从MYSQL表中绘制一个LineChart。与MYSQL相关的一切工作正常，但是当我想使用pChart绘制一个LineChart时，我得到错误（警告：在... \ class \ pDraw.class.php中对第3113行进行除零）。请帮帮我！在pDraw中划分为零php类

下面的代码：

<?php 

include("class/pData.class.php"); 
include("class/pDraw.class.php"); 
include("class/pImage.class.php"); 

$filename = 'file.txt'; 
echo 'Status info:<br />'; 
$myData = new pData(); 

$db=mysql_connect("localhost","root","") or die("Failed to connect with database!"); 

echo '<br>* Connected to database successfully - OK<br />'; 

mysql_select_db("database", $db); 

mysql_query("CREATE TABLE `measures` (
timestamp INT(10), 
temperature INT(10), 
humidity INT(10), 
PRIMARY KEY (timestamp));"); 

echo "<br> * Table created successfully or it has been created earlier - OK<br />"; 

mysql_query("LOAD DATA INFILE '$filename' IGNORE INTO TABLE measures 
FIELDS TERMINATED BY ',' 
LINES TERMINATED BY '\n' ") 
or die("MySQL - Query Error - " . MySQL_Error()); 

echo "<br>* Data imported successfully - OK<br />"; 

$Requete = "SELECT * FROM `measures`"; 
$Result = mysql_query($Requete,$db); 
while($row = mysql_fetch_array($Result)) 
{ 
$timestamp[] = $row["timestamp"]; 
$temperature[] = $row["temperature"]; 
$humidity[] = $row["humidity"]; 
} 
$myData->addPoints($timestamp,"Timestamp"); 
$myData->addPoints($temperature,"Temperature"); 
$myData->addPoints($humidity,"Humidity"); 
$myData->setAbscissa("Timestamp"); 
$myData->setSerieOnAxis("Humidity", 1); 
$myData->setXAxisName("Time"); 
$myData->setXAxisDisplay(AXIS_FORMAT_TIME,"H:i"); 
$myData->setAxisName(0,"Temperature"); 
$myData->setAxisUnit(0,"°C"); 
$myData->setAxisName(1,"Humidity"); 
$myData->setAxisUnit(0,"%"); 
$myPicture = new pImage(700,230,$myData); 
$myPicture->drawLineChart(); 
?>

编辑：

下面是一个包含线3113在pDraw.php

function scaleComputeY($Values,$Option="",$ReturnOnly0Height=FALSE) 
    { 
    $AxisID = isset($Option["AxisID"]) ? $Option["AxisID"] : 0; 
    $SerieName = isset($Option["SerieName"]) ? $Option["SerieName"] : NULL; 

    $Data = $this->DataSet->getData(); 
    if (!isset($Data["Axis"][$AxisID])) { return(-1); } 

    if ($SerieName != NULL) { $AxisID = $Data["Series"][$SerieName]["Axis"]; } 
    if (!is_array($Values)) { $tmp = $Values; $Values = ""; $Values[0] = $tmp; } 

    $Result = ""; 
    if ($Data["Orientation"] == SCALE_POS_LEFTRIGHT) 
     { 
     $Height  = ($this->GraphAreaY2 - $this->GraphAreaY1) - $Data["Axis"][$AxisID]["Margin"]*2; 
     $ScaleHeight = $Data["Axis"][$AxisID]["ScaleMax"] - $Data["Axis"][$AxisID]["ScaleMin"]; 
     $Step  = $Height/$ScaleHeight; 

     if ($ReturnOnly0Height) 
     { foreach($Values as $Key => $Value) { if ($Value == VOID) { $Result[] = VOID; } else { $Result[] = $Step * $Value; } } } 
     else 
     { foreach($Values as $Key => $Value) { if ($Value == VOID) { $Result[] = VOID; } else { $Result[] = $this->GraphAreaY2 - $Data["Axis"][$AxisID]["Margin"] - ($Step * ($Value-$Data["Axis"][$AxisID]["ScaleMin"])); } } } 
     } 
    else 
     { 
     $Width  = ($this->GraphAreaX2 - $this->GraphAreaX1) - $Data["Axis"][$AxisID]["Margin"]*2; 
     $ScaleWidth = $Data["Axis"][$AxisID]["ScaleMax"] - $Data["Axis"][$AxisID]["ScaleMin"]; 
     $Step  = $Width/$ScaleWidth; 

     if ($ReturnOnly0Height) 
     { foreach($Values as $Key => $Value) { if ($Value == VOID) { $Result[] = VOID; } else { $Result[] = $Step * $Value; } } } 
     else 
     { foreach($Values as $Key => $Value) { if ($Value == VOID) { $Result[] = VOID; } else { $Result[] = $this->GraphAreaX1 + $Data["Axis"][$AxisID]["Margin"] + ($Step * ($Value-$Data["Axis"][$AxisID]["ScaleMin"])); } } } 
     } 

    if (count($Result) == 1) 
     return($Result[0]); 
    else 
     return($Result); 
    }

来源

2013-12-20 UFO

什么是3113线？ –

$ Step = $ Width/$ ScaleWidth; – UFO

它在'3113'行上的功能是什么？ –

您可以通过更改这一行修复功能：

$Step  = $Width/$ScaleWidth;

to ：

if ($ScaleWidth > 0) { 
    $Step  = $Width/$ScaleWidth; 
} else { 
    $Step  = 1; // or change this to 0 if it doesn't work, I am not sure what this line does. 
}

来源

2013-12-21 08:09:08

在pDraw中划分为零php类

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