Svgphp-diagram


             Variables 
$svgwidth=800;
$svgheight=400;
$graphheight = 300;
$graphwidth = 750;
$margin = 20;
$scaleSize = 125; //Minimum value on Y-axis - use round numbers!
$minScaleCount = 5; //Maximum number of valuespoints on Y-axis
//serie colors
$serieAColor = 'green';
$serieBColor = 'orange';
$serieCColor = 'blue';
$serieDColor = 'purple';
$serieEColor = 'red';
$serieFColor = 'yellow';
$serieGColor = 'navy';
$serieHColor = 'gray';
$serieIColor = 'black';
$serieJColor = 'pink';
 Parameter passing 
/*
series are defined in the values of serieA=NAME... example:
 serieA=redhat
 serieB=mandrake
 serieC=turbo
the serievalues are then defined like NAME.N=VALUE. Where the first value of N = startDate... example:
 startDate=1
 endDate=3
 redhat1=225
 redhat2=325
 redhat3=1256
 mandrake3=556
store these parameters in a variable like this:
$parameters = "?startMonth=1&endMonth=3&startYear=2002&serieA=redhat&serieB=mandrake";
$parameters .= "&redhat1=333&redhat2=444&mandrake1=0&mandrake2=555&mandrake3=666";
note that empty field should be written as zero
Usually a graph will be embedded in a another webpage. Do it like this:

Permanent Code
You don't need to alter anything below here.
*/
header("Content-type: image/svg+xml");
print('');
?>
//find largest value of all series.
$largestValue = 0;
$stop = false;
for ($a = A; !$stop; $a++){
 $thisSerie = ${'serie'.$a}; //$thisSerie has variable value of FX $serieA. FX "Expected"
 if (!$thisSerie){ $stop = true; }
 else{
 for ($i = 0; $i <= $xPointCount - 1; $i++){
 $thisValue = ${$thisSerie.urldecode(${'xPoint'.$i})}; //$thisValue has variables value of $ExpectedAlbertazzi. FX "122"
 if ($thisValue > $largestValue){ $largestValue = $thisValue; }
 }
 }
}
//calculate scale for Y-Axis
$scaleCount = $largestValue / $scaleSize;
while ($scaleCount > $minScaleCount){
 $scaleSize *= 2;
 $scaleCount = $largestValue / $scaleSize;
}
$ySteps = $graphheight / ($scaleCount + 1);
//write Y-Axis
for ($i = 0; $i <= $scaleCount + 1 ; $i++ ){
 $y = $graphheight - ($i * $ySteps);
 $lineLength = $graphwidth;
 echo ''.$i * $scaleSize.'';
 echo '';
}
//write legend
//initialize Legend variables
$legendXPos = -40;
$legendYPos = $graphheight + 85;
$legendTextYPos = $graphheight + 90;
$stop = false;
for ($a = A; !$stop; $a++){
 $thisSerie = ${'serie'.$a}; //$thisSerie has value of variable $serieA FX "Expected"
 if (!$thisSerie){ $stop = true; }
 else{
 $legendXPos += 70;
 $color = ${'serie'.$a.'Color'};
 echo '';
 $legendXPos += 10;
 echo ''.$thisSerie.'';
 }
}
//draw diagram
//initialize diagramVariables
$yPixelFactor = $scaleSize/$ySteps;
$xSteps = ($graphwidth - $margin) / ($xPointCount + 1);
$coloumnWidth = $xSteps/3;
$xlabelYPos = $graphheight + 10;
$thisX = $margin + 30;
//echo ''.$temp.''; //this if only for testing
for ($i = 0; $i <= $xPointCount - 1; $i++){
 //writes xPoint-labels
 $xLabelXPos = $thisX + 5;
 echo ''.urldecode(${'xPoint'.$i}).'';
 //write series coloumn
 $colX = $thisX;
 $stop = false;
 for ($a = A; !$stop; $a++){
 $thisSerie = ${'serie'.$a}; //$thisSerie has variable value of FX $serieA. FX "Expected"
 if (!$thisSerie){ $stop = true; }
 else{
 $color = ${'serie'.$a.'Color'};
 $thisValue = ${$thisSerie.urldecode(${'xPoint'.$i})}; //$thisValue has variables value of $ExpectedAlbertazzi. FX "122"
 $thisValue /= $yPixelFactor;
 $thisY = $graphheight - $thisValue;
 echo ' fill="'.$color.'" stroke="none" stroke-width="2"/>';
 $colX += $coloumnWidth;
 }
 }
 $thisX += $xSteps;
}
?>
Graphics Php
