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Use Pchart on a Server free
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msryan
pChart user
Joined: Tue Jun 12, 2012 10:08 am
Posts: 5
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 Use Pchart on a Server free I apologise for this simple question.i'm trying to buid some charts for my application. I have just installed pChart (Server Free, PHP5) and have followed all instructions on the web page - but only this error Code: Warning: Cannot modify header information - headers already sent by (output started at /mnt/109/sda/5/8/segula.lsa234/temperature_stat.php:30) in /mnt/109/sda/5/8/segula.lsa234/pImage.class.php on line 166
when i'm trying to use pchart class. GD extension is enabled. Where do I start looking for the problem? 
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| Tue Jun 12, 2012 12:50 pm |
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chartbreaker
Experienced pChart user
Joined: Tue Aug 02, 2011 11:49 pm
Posts: 34
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Re: Use Pchart on a Server free you echoed some output already before the header information was sent by pImage.class.php on line 166 put Code: <?php ob_start(); /* activate output buffering until header() was sent */ ?> in the very first line of your script and Code: <?php ob_end_flush(); /* stop output buffering and echo buffer content */ ?> in the last line of your script
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| Thu Jun 14, 2012 7:23 am |
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msryan
pChart user
Joined: Tue Jun 12, 2012 10:08 am
Posts: 5
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Re: Use Pchart on a Server free Thanks for reply to my post
but i don't understand very well!!
in which file do i put those lines? in pImage.class.php or in the page where i want the image to be created?
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| Thu Jun 14, 2012 8:22 am |
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chartbreaker
Experienced pChart user
Joined: Tue Aug 02, 2011 11:49 pm
Posts: 34
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Re: Use Pchart on a Server free into your file in which you also included the pChart classes
explanation: pImage.class.php uses the php header() command before creating the png image
header() can only be used if no content output at all was sent by the server to the client
i think your page does some output before including the pChart classes and before rendering the image
so output buffering as described should be a workaround, because it holds back the complete output till the end of your script
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| Thu Jun 14, 2012 12:00 pm |
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msryan
pChart user
Joined: Tue Jun 12, 2012 10:08 am
Posts: 5
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Re: Use Pchart on a Server free thx for your help!!! i don't have this error!! but i have another one: Code: l'image "http://segula.lsa234.free.fr/temperature_stat.php" ne peut être affichée car elle contient des erreurs. i don't find my mistake. Here is the code which allows me to create the image: Code: if(isset ($_POST))
{
$numeroseriefauteuil=$_POST['numeroserieFauteuil'];
$temperature= array();// tableau contenant toutes la valeurs de temperature
$time= array(); //tableau conteant les timeStamp correspondant aux temperatures
$mabasededonnee="*******";
// test la connection
$connection = mysql_connect("******","*****","******");
if ( ! $connection )
die ("connection impossible");
// Connecte la base
mysql_select_db($mabasededonnee) or die ("pas de connection" );
// récupération de la période de température enregistrée par le médécin
$query="SELECT periodetemp, nomalade FROM DataRegister WHERE numeroserieFaut='$numeroseriefauteuil'";
$result=mysql_query($query);
while ($donnees=@mysql_fetch_array($result))
{
$nom=$donnees['nomalade'];
$periode=$donnees['periodetemp'];
}
// Récupération des valeurs présentes
$query="SELECT temp, date FROM fauteuil WHERE numeroserieFaut='$numeroseriefauteuil'";
$result=mysql_query($query);
while ($data=@mysql_fetch_array($result))
{
$temperature[]=$data['temp'];
$time[]=$data['date'];
}
/* Create and populate the pData object */
$MyData = new pData();
$MyData->addPoints($temperature,"Probe 1");
$MyData->setAxisName(0,"Temperatures");
$MyData->addPoints($time,"Labels");
$MyData->setSerieDescription("Labels","date");
$MyData->setAbscissa("Labels");
/* Create the pChart object */
$myPicture = new pImage(700,230,$MyData);
/* Draw the background */
$Settings = array("R"=>170, "G"=>183, "B"=>87, "Dash"=>1, "DashR"=>190, "DashG"=>203, "DashB"=>107);
$myPicture->drawFilledRectangle(0,0,700,230,$Settings);
/* Overlay with a gradient */
$Settings = array("StartR"=>219, "StartG"=>231, "StartB"=>139, "EndR"=>1, "EndG"=>138, "EndB"=>68, "Alpha"=>50);
$myPicture->drawGradientArea(0,0,700,230,DIRECTION_VERTICAL,$Settings);
$myPicture->drawGradientArea(0,0,700,20,DIRECTION_VERTICAL,array("StartR"=>0,"StartG"=>0,"StartB"=>0,"EndR"=>50,"EndG"=>50,"EndB"=>50,"Alpha"=>80));
/* Add a border to the picture */
$myPicture->drawRectangle(0,0,699,229,array("R"=>0,"G"=>0,"B"=>0));
/* Write the picture title */
$myPicture->setFontProperties(array("FontName"=>"Silkscreen.ttf","FontSize"=>6));
$myPicture->drawText(10,13,"Temperature du patient: $nom",array("R"=>255,"G"=>255,"B"=>255));
/* Write the chart title */
$myPicture->setFontProperties(array("FontName"=>"Forgotte.ttf","FontSize"=>11));
$myPicture->drawText(250,55,"temperature",array("FontSize"=>20,"Align"=>TEXT_ALIGN_BOTTOMMIDDLE));
/* Draw the scale and the 1st chart */
$myPicture->setGraphArea(60,60,500,200);
$myPicture->drawFilledRectangle(60,60,450,190,array("R"=>255,"G"=>255,"B"=>255,"Surrounding"=>-200,"Alpha"=>10));
$myPicture->drawScale(array("DrawSubTicks"=>TRUE));
$myPicture->setShadow(TRUE,array("X"=>1,"Y"=>1,"R"=>0,"G"=>0,"B"=>0,"Alpha"=>10));
$myPicture->setFontProperties(array("FontName"=>"pf_arma_five.ttf","FontSize"=>6));
$myPicture->drawLineChart(array("DisplayValues"=>TRUE,"DisplayColor"=>DISPLAY_AUTO));
$myPicture->setShadow(FALSE);
/* Write the chart legend */
$myPicture->drawLegend(510,205,array("Style"=>LEGEND_NOBORDER,"Mode"=>LEGEND_HORIZONTAL));
/* Render the picture (choose the best way) */
$myPicture->autoOutput("temperature_stat.png");
} please can you help me to find the mistake!!! thanks for u'r help!!
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| Fri Jun 15, 2012 7:35 am |
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chartbreaker
Experienced pChart user
Joined: Tue Aug 02, 2011 11:49 pm
Posts: 34
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Re: Use Pchart on a Server free first error fixed - glad I could help you with it new error No.2: I don't understand French, so I don't know what the error is about, please translate Quote: l'image "http://segula.lsa234.free.fr/temperature_stat.php" ne peut être affichée car elle contient des erreurs.
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| Fri Jun 15, 2012 11:55 am |
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darkspaul
New pChart user
Joined: Tue May 22, 2012 2:12 pm
Posts: 1
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Re: Use Pchart on a Server free Google trad is your friend.  Quote: the image "http://segula.lsa234.free.fr/temperature_stat.php" can not be displayed because it contains errors. i hope you understand this translate, because I'm french too, and my English is bad ( shame on me =/)
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| Fri Jun 15, 2012 2:37 pm |
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chartbreaker
Experienced pChart user
Joined: Tue Aug 02, 2011 11:49 pm
Posts: 34
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Re: Use Pchart on a Server free are you sure that the $temperature and $time arrays contain correct data? I doubt it. Code: while ($data=@mysql_fetch_array($result)) {
$temperature[]=$data['temp'];
$time[]=$data['date'];
} have a look at the data with Code: echo '<pre>';
print_r($data);
print_r($temperature);
print_r($time);
echo '</pre>';
/* following 2 lines needed after this preliminary output of the arrays only to suppress the rest of the script */
ob_end_flush(); /* because you've set ob_start(); in the very first line of your script */
exit(); /* exit the script here to prevent the image error */ before running pChart functions (please add these few lines after the while-loop and post the results) I think you have to use array_push() to fill the arrays correctly.
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| Sat Jun 16, 2012 9:49 pm |
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msryan
pChart user
Joined: Tue Jun 12, 2012 10:08 am
Posts: 5
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Re: Use Pchart on a Server free i add the few lines as u say. i have the right informations in my tabs after the while-loop. Code: Array
(
[0] => 21
[1] => 40
)
Array
(
[0] => 2012-05-29 14:57:46
[1] => 2012-05-29 14:59:38
) but i can't build my chart!!!
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| Mon Jun 18, 2012 9:01 am |
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chartbreaker
Experienced pChart user
Joined: Tue Aug 02, 2011 11:49 pm
Posts: 34
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Re: Use Pchart on a Server free ok I've made a test chart with your code (just changed the paths for include-classes and fonts) and your data and the output worked Code: <?php
include("../charts/pChart/class/pData.class.php");
include("../charts/pChart/class/pDraw.class.php");
include("../charts/pChart/class/pImage.class.php");
$temperature[] = 21;
array_push($temperature, 40);
$time[] = '2012-05-29 14:57:46';
array_push($time, '2012-05-29 14:59:38');
/* Create and populate the pData object */
$MyData = new pData();
$MyData->addPoints($temperature,"Probe 1");
$MyData->setAxisName(0,"Temperatures");
$MyData->addPoints($time,"Labels");
$MyData->setSerieDescription("Labels","date");
$MyData->setAbscissa("Labels");
/* Create the pChart object */
$myPicture = new pImage(700,230,$MyData);
/* Draw the background */
$Settings = array("R"=>170, "G"=>183, "B"=>87, "Dash"=>1, "DashR"=>190, "DashG"=>203, "DashB"=>107);
$myPicture->drawFilledRectangle(0,0,700,230,$Settings);
/* Overlay with a gradient */
$Settings = array("StartR"=>219, "StartG"=>231, "StartB"=>139, "EndR"=>1, "EndG"=>138, "EndB"=>68, "Alpha"=>50);
$myPicture->drawGradientArea(0,0,700,230,DIRECTION_VERTICAL,$Settings);
$myPicture->drawGradientArea(0,0,700,20,DIRECTION_VERTICAL,array("StartR"=>0,"StartG"=>0,"StartB"=>0,"EndR"=>50,"EndG"=>50,"EndB"=>50,"Alpha"=>80));
/* Add a border to the picture */
$myPicture->drawRectangle(0,0,699,229,array("R"=>0,"G"=>0,"B"=>0));
/* Write the picture title */
$myPicture->setFontProperties(array("FontName"=>"../charts/pChart/fonts/arial.ttf","FontSize"=>6));
$myPicture->drawText(10,13,"Temperature du patient: $nom",array("R"=>255,"G"=>255,"B"=>255));
/* Write the chart title */
$myPicture->setFontProperties(array("FontName"=>"../charts/pChart/fonts/arial.ttf","FontSize"=>11));
$myPicture->drawText(250,55,"temperature",array("FontSize"=>20,"Align"=>TEXT_ALIGN_BOTTOMMIDDLE));
/* Draw the scale and the 1st chart */
$myPicture->setGraphArea(60,60,500,200);
$myPicture->drawFilledRectangle(60,60,450,190,array("R"=>255,"G"=>255,"B"=>255,"Surrounding"=>-200,"Alpha"=>10));
$myPicture->drawScale(array("DrawSubTicks"=>TRUE));
$myPicture->setShadow(TRUE,array("X"=>1,"Y"=>1,"R"=>0,"G"=>0,"B"=>0,"Alpha"=>10));
$myPicture->setFontProperties(array("FontName"=>"../charts/pChart/fonts/arial.ttf","FontSize"=>6));
$myPicture->drawLineChart(array("DisplayValues"=>TRUE,"DisplayColor"=>DISPLAY_AUTO));
$myPicture->setShadow(FALSE);
/* Write the chart legend */
$myPicture->drawLegend(510,205,array("Style"=>LEGEND_NOBORDER,"Mode"=>LEGEND_HORIZONTAL));
/* Render the picture (choose the best way) */
$myPicture->autoOutput("temperature_stat.png");
?> so the problem must be elsewhere in your code to help you with that, you have to post the complete code I guess it would be better to have a separate file for the charting function instead of integrating the code in the main script you would include this separate file after the database-operations are successfully done so that the charting will be done outside the if(isset ($_POST)) {-expression and only when $temperature and $time contains suitable data, which you can proof also separately and you can try to render the image as a flat png-file and insert a HTML <img> tag in your website to display the output-png thereto you have to use $myPicture->render($imgPathFile); instead of $myPicture->autoOutput("temperature_stat.png"); $imgPathFile contains the the path and filename like '../charts/imgCache/chart1.png' but you have to make sure that the imgCache directory exists and that it is writeable for your script echo '<img id="chart1" src="'.$imgPathFile.'" alt="chart1" border="0">'; should work for the output
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| Mon Jun 18, 2012 10:29 am |
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