objects and classes

[slh]

hello im stuck and i need your help please

Problem:

i have a template class for a graph and i want to import information to the template to create multiple graphs with different statistics. here is my code:

<?PHP
//get all class files required

require "dbConnect.php"; 
$conn = new dbConnect();

require "getData_cls.php";
$myData = new data();
 
require "shape_cls.php";
$displayGraph = new shape();

//get data from classes

$connection = $conn->connect();

$countMen = $myData->getMen($connection);
$countWomen = $myData->getWomen($connection);

$countStirAttendeeYes = $myData->getStirAttendeeYes($connection);
$countStirAttendeeNo = $myData->getStirAttendeeNo($connection);

//describe data in context of graph

if($countMen && $countWomen){
    
    $displayGraph->dataAlpha = $countMen;
    $displayGraph->dataBeta = $countWomen;
    $displayGraph->title = 'Gender';
    $displayGraph->dataKeyAlpha = 'Men';
    $displayGraph->dataKeyBeta = 'Women';
    
    $displayGraph->graph();
}
if($countStirAttendeeYes && $countStirAttendeeNo){
    
    $displayGraph->dataAlpha = $countStirAttendeeYes;
    $displayGraph->dataBeta = $countStirAttendeeNo;
    $displayGraph->title = 'Stirling Uni Attendees';
    $displayGraph->dataKeyAlpha = 'Yes';
    $displayGraph->dataKeyBeta = 'No';

    $displayGraph->graph();
}


?>

the graph class files is:

<?PHP
class shape{
    
    var $dataAlpha;
    var $dataBeta;
    var $title;
    var $dataKeyAlpha;
    var $dataKeyBeta;
/**************************************************************************
                function graph
***************************************************************************/

    function graph(){
        $dataAlpha = trim($this->dataAlpha);
        $dataBeta = trim($this->dataBeta);
        $title = trim($this->title);
        $dataKeyAlpha = trim($this->dataKeyAlpha);
        $dataKeyBeta = trim($this->dataKeyBeta);

    /*for the y axis when describing shapes use the height-value to make it easier to work out*/
        
        $height = 150;        
        $width = 200;    

        $countTotal = $dataAlpha + $dataBeta;
        $perCentAlpha = floor($dataAlpha / $countTotal * 100);
        $perCentBeta = floor($dataBeta / $countTotal * 100);

        $titlePos = $width-190;

        $image = imagecreate($width,$height);
        $grey = ImageColorAllocate($image,210,210,210);
        
        $blue = ImageColorAllocate($image,0,130,255);
        $pink = ImageColorAllocate($image,255,0,240);
        $white = ImageColorAllocate($image,255,255,255);
        $black = ImageColorAllocate($image,0,0,0);

        imageString($image, 5, $titlePos, $height-140, $title, $black); //title
        
                
        
        imageFilledRectangle($image,10,$height-$perCentAlpha,30,$height-10,$blue);        //bar to represent men

        imageFilledRectangle($image,40,$height-$perCentBeta,60,$height-10,$pink);        //bar to represent women

        imageFilledRectangle($image,8,$height-100,9,$height-0,$black);                        //y axis

        imageFilledRectangle($image,0,$height-9,70,$height-8,$black);                        //x axis

        imageString($image, 5, 100, $height-50,  "$dataKeyAlpha".': '."$perCentAlpha".'%', $blue); //info
        imageString($image, 5, 100, $height-35,  "$dataKeyBeta".': '."$perCentBeta".'%', $pink); //info

        header ("Content-type: image/png");
        ImagePng($image); 
        ImageDestroy($image);
    }//end graph function
    

}//end class
?>

essentialy i have to create multiple instances of the graph class and I think its something to do with constructors and stuff but im not sure.

any help appreciated.
slh

[piz]

Well... I didn't read all the code... but what is your problem?

[Celtboy]

you should create a constructor: (in shape_cls.php) :

function shape() {
return;
} 

but you should be able to create multiple instances...

you created the object $displayGraph, and then have it performing functions. Why not create other variables like $otherDisplayGraph or $displayGraph2 ??

[slh]

i tried that but it doesnt seem to make any difference:

if($countMen && $countWomen){
    $displayGraph = new shape();

    $displayGraph->dataAlpha = $countMen;
    $displayGraph->dataBeta = $countWomen;
    $displayGraph->title = 'Gender';
    $displayGraph->dataKeyAlpha = 'Men';
    $displayGraph->dataKeyBeta = 'Women';
    
    $displayGraph->graph();
}

if($countStirAttendeeYes && $countStirAttendeeNo){
    $displayGraph2 = new shape();

    $displayGraph2->dataAlpha = $countStirAttendeeYes;
    $displayGraph2->dataBeta = $countStirAttendeeNo;
    $displayGraph2->title = 'Stirling Uni Attendees';
    $displayGraph2->dataKeyAlpha = 'Yes';
    $displayGraph2->dataKeyBeta = 'No';

    $displayGraph2->graph();
} 

am i doing something wrong?
I also added the constructor but it hasnt helped either.
any other ideas?

thanks so far guys
slh

[Celtboy]

so....you're not getting anything displayed by your calls to functions on the second object?

inside your "if" statment

...
if($countStirAttendeeYes && $countStirAttendeeNo){
... 

stick a

print "testing<br/>\n"; 

to make sure that the condition you're evaluating is evaluating as true.

[slh]

cheers for that. they were being drawn over one another so i couldnt see them.

trying to figure out how to specify where the image is drawn on the page!!

thanks so far
slh