Php script to resize and add watermark

$xoffset=0;

$yoffset=0;

$opacitypercent = 80;

$scaling = 480;

$Photos=GetFileList();

foreach ($Photos as $original){

$watermark='logo.png';

AddWM($original,$watermark);
echo '*';

}

function AddWM($photo,$watermark){

//xoffset of the watermark

global $xoffset;

//yoffset of the watermark

global $yoffset;

//the original image to be watermarked

$originalimage=$photo;

//the watermark to apply

$watermarkimage = $watermark;

//top end opacity number (totally transparent)

$opacity0 = @MagickGetQuantumRange();

//bootom opacity (totally visible)

$opacity100 = 0;

//desired opacity percentage

// THIS IS THE ONE TO SET

global $opacitypercent;

//gather the actual opacity number

$opacity = $opacity0 * ( 1 - $opacitypercent/100 ) ;

//initialize the wands

$sourceWand = NewMagickWand();

$compositeWand = NewMagickWand();

//read in the images

@MagickReadImage($sourceWand, $originalimage);

@MagickReadImage($compositeWand, $watermarkimage);

//resize the original photo

global $scaling;

$PhotoWidth = MagickGetImageWidth($sourceWand);

$PhotoHeight = MagickGetImageHeight($sourceWand);

$WvsH = $PhotoWidth/$PhotoHeight;

if($WvsH>=1){

$resizeresult = MagickScaleImage( $sourceWand, $scaling, $scaling/$WvsH);

}else{

$resizeresult = MagickScaleImage( $sourceWand, $scaling*$WvsH, $scaling);

}

//setting the image index

MagickSetImageIndex($compositeWand, 0);

MagickSetImageType($compositeWand, MW_TrueColorMatteType);

//seting the opacity level

MagickEvaluateImage($compositeWand, MW_SubtractEvaluateOperator, $opacity, MW_OpacityChannel) ;

//combining the images

@MagickCompositeImage($sourceWand, $compositeWand, MW_OverCompositeOp, $xoffset, $yoffset);

//create a subdirectory to store photos with watermark

if(!is_dir("PhotosWithWaterMark")){

mkdir("PhotosWithWaterMark", 0755);

}

//generate the image

MagickWriteImage( $sourceWand, "PhotosWithWaterMark/"."WM_".$photo);

}

function GetFileList(){

$dir = "./";

$PhotoFormats = array('jpg','jpeg');

// Open a known directory, and proceed to read its contents

if ($dh = opendir($dir)) {

$PhotosList = '';

while (($file = readdir($dh)) !== false) {

$NameExt = explode(".",$file);

if (in_array(strtolower($NameExt[count($NameExt)-1]),$PhotoFormats)){

echo "filename: $file" . "\n";

$PhotosList[] = $file;

}

}

closedir($dh);

}

return $PhotosList;

}

?>