This is the code used in the printing function for the MapServer application running at ​http://maps.macnoise.com/interactive/

Much of this code is hard coded specifically for this application, but hopefully bits and pieces can serve as a useful example.

Code sample created by David Bitner, frequent lurker on MapServer mailing list and IRC channels.

<?php
set_time_limit(60000);
ini_set('max_execution_time',0);
dl("php_mapscript.so");
$mapfile=$_REQUEST['map'];
$map = ms_newMapObj($mapfile);
$map->selectOutputFormat('jpeg'); //fpdf seems to play better with jpeg

//get map extent
if ($_REQUEST['mapext']) { 
       $mapext = $_REQUEST['mapext'];
       $extent = explode(" ", $mapext);
       $map->setExtent($extent[0], $extent[1],$extent[2], $extent[3]);
}

//get list of layers and cycle through to turn them on
if (isset($_REQUEST['layers'])) {
       $layerlist = rtrim($_REQUEST['layers']);
       $layers = explode(" ", $layerlist);
       $numLayers = $map->numlayers;
       for ($i = 0; $i < $numLayers; $i++) {
               $activeLayer = $map->getlayer($i);
			   if ($activeLayer->status != 2) $activeLayer->set("status", 0);
       }
       foreach ($layers as $l) {
               $activeLayer = $map->getlayerbyname($l);
               $activeLayer->set("status", 1);
       }
}
$ft=$map->getlayerbyname('FlightTracks');
$ftstat=$ft->status;
// this is used to allow cgi substitutions in data strings
for ($i = 0; $i < $map->numlayers; $i++) {
	$activeLayer = $map->getlayer($i);
	$datastring=$activeLayer->data;
	if (preg_match_all("/%([\w].+?)%/",$datastring,$matches,PREG_SET_ORDER)>0){
		foreach ($matches as $match){
			$search=$match[0];
			$replace=$match[1];
			if (isset($_REQUEST[$replace])){
				$replaceval=$_REQUEST[$replace];
				$datastring=str_replace($search,$replaceval,$datastring);
				$activeLayer->set("data",$datastring);
			} else {
				if (!($activeLayer->name == 'FlightTracks' && isset($_REQUEST['sDate']) && isset($_REQUEST['eDate']))) $activeLayer->set("status", 0);
			}
		}
	
	}		   
}
$headerstring='';

//conditionals used to only display certain messages when certain layers are turned on
$ft=$map->getlayerbyname('FlightTracks');
$ftstat=$ft->status;
$add=$map->getlayerbyname('house');
$addstat=$add->status;
if ($ftstat==1) $headerstring=$headerstring.'Time Period: '.$_REQUEST['sDate'].'-'.$_REQUEST['eDate'];
if ($addstat==1) $headerstring=$headerstring.' Address Shown: '.$_REQUEST['add'];


$resolution=isset($_REQUEST['resolution'])?$_REQUEST['resolution']:150; //allows to set resolution or defaults to 150dpi
$mapfile_resolution=$map->resolution;
$scalefactor=$resolution/$mapfile_resolution; //how much everything needs to be multiplied by
$map->set('resolution',$resolution); // set new resolution for min/max scale renderings


// loop through layers to extract class images and names and to resize styles and truetype symbols
$numLayers = $map->numlayers;
$classimages=array();
$classnames=array();
for ($i=0; $i < $numLayers; $i++) {
	$layer = $map->getlayer($i);
	if ($layer->status == 1 ){
	for ($j=0; $j < $layer->numclasses; $j++) {
		$class = $layer->getClass($j);
		$label = $class->label;
		if ($layer->type !=4){
			$classimageobj=$class->createLegendIcon(60,60);
			$classimages[]=$classimageobj->saveWebImage();
			$classnames[]=$class->name;
		}
		if ($label->mindistance>1){
			$md=$label->mindistance;
			$newmd=$md*$scalefactor;
			$label->set('mindistance',$newmd);
		}
		if ($label->type == 'TRUETYPE') {
			$labelsize=$label->size;
			$newlabelsize=$labelsize*$scalefactor;
			$label->set('size',$newlabelsize);
		}
		for ($k=0; $k < $class->numstyles; $k++) {
			$style = $class->getStyle($k);
			$style->set("size", $style->size * $scalefactor);
			$style->set("offsetx", $style->offsetx * $scalefactor);
			$style->set("offsety", $style->offsety * $scalefactor);
		}
	}
	}
}
$nrows=ceil(count($classnames)/4); // make 4 columns to display legend
$legheight=$nrows*.25; // determine height of legend
$mapheight=9.3-$legheight; // determine area left to draw map
$legstart=$mapheight+1.05; // determine where to start the legend

$map->set("width", 7.6*$resolution);
$map->set("height", $resolution*$mapheight); // make map rectangle fit page
//echo $mapheight*$resolution;
//draw map
$imgMap = $map->draw();
$urlMap = $imgMap->saveWebImage();

require('fpdf.php');
class PDF extends FPDF
{
//Page header
function Header()
{ 
   
}

//Page footer
function Footer()
{
    $this->SetY(-1);
    $this->SetFont('Arial','I',7);
}
function draw_legend($textarray,$imgarray,$startx,$starty,$nr){ // function draws the 4 column table
	$this->SetFont('Times','',12);
	$y=$starty-.25;
	$x=$startx;
	$first=true;
	
	for ($i=0;$i<count($textarray);$i++){
		if ($i==$nr or $i==2*$nr or $i==3*$nr) {
			$y=$starty-.25;
			$x=$x+1.9;
			$first=false;
		}
		$y=$y+.25;
		$imgurl=$imgarray[$i];
		$text=$textarray[$i];
		$this->Image($imgurl,$x,$y,.20,.20);
		$this->Text($x+.25,$y+.15,$text);
	}
}
}

//Instanciation of inherited class
$pdf=new PDF('P','in','letter');

$pdf->SetDisplayMode('fullpage');
$pdf->SetMargins(.25,.25);

$pdf->AddPage();


$pdf->SetFont('Arial','B',14);
$pdf->Cell(0,.50,'MACNOISE Interactive Map',0,1,'C');
$pdf->SetFont('Arial','',10);
$pdf->Cell(0,.02,$headerstring,0,1,'C');


$pdf->SetLineWidth(.1);
$pdf->SetDrawColor(0,0,150);
$pdf->Rect(.25,.25,8,10.5);

$pdf->Image($urlMap,.45,.9,7.6,$mapheight);
$pdf->Image("/var/apache/htdocs/graphics/MACnorth1.png",.45,.9,1,1);

$pdf->SetLineWidth(.01);
$pdf->SetDrawColor(0,0,200);
$pdf->Rect(.40,.85,7.7,$mapheight+.1);
$pdf->Rect(.40,$legstart,7.7,$legheight+.1);

$date=date('M j, Y g:i');
$datemessage="Map created by http://maps.macnoise.com/interactive/ on $date. This information is to be used for reference purposes only.";
$disclaimer="The Metropolitan Airports Commission does not guarantee accuracy of the material contained herein and is not responsible for misuse or misinterpretation.";
$pdf->SetFont('Arial','I',7);
$pdf->Text(.45,10.55,$datemessage);
$pdf->Text(.45,10.65,$disclaimer);
$pdf->SetTitle('MACNoise Interactive Map');
$pdf->draw_legend($classnames,$classimages,.45,$legstart+.05,$nrows);

$pdf->Output();
//$pdf->Output('macnoise.pdf','D');
?>

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