Problem with PHP & Watermarking

Hi,

I'm using the following function to watermark a picture on the server:

function ks_watermark($image, $watermark, $save_as, $position=9, $transparency=50, $t_x=0, $t_y=0) {
	// Positionen:
		// 1 oben links
		// 2 oben mittig
		// 3 oben rechts
		// 4 Mitte links
		// 5 Mitte
		// 6 Mitte rechts
		// 7 unten links
		// 8 unten mittig
		// 9 unten rechts
	// erlaubt sind png und jpeg
	if($position < 1 || $position > 9)
		return FALSE;
	if(!file_exists($image) || !file_exists($watermark))
		return FALSE;
	$infos_img = getimagesize($image);
	$infos_wat = getimagesize($watermark);
	if(!in_array($infos_img[2], array(2,3)) ||     !in_array($infos_wat[2], array(2,3)))
		return FALSE;
	if($infos_img[0]<$infos_wat[0] || $infos_img[1]<$infos_wat[1])
		return FALSE;
	if($infos_wat[0]<$t_x || $infos_wat[1]<$t_y)
		return FALSE;
	$transparency = 100 - $transparency;
	if($transpareny < 0 || $transpareny > 100)
		return FALSE;
	@unlink($save_as);

	// Position x
	switch (($position-1)%3) {
		case 0:
			$pos_x = 0;
			break;
		case 1:
			$pos_x = round(($infos_img[0]-$infos_wat[0])/2, 0);
			break;
		case 2:
			$pos_x = $infos_img[0]-$infos_wat[0];
			break;
	}
	// Position y
	switch (floor(($position-1)/3)) {
		case 0:
			$pos_y = 0;
			break;
		case 1:
			$pos_y = round(($infos_img[1]-$infos_wat[1])/2, 0);
			break;
		case 2:
			$pos_y = $infos_img[1]-$infos_wat[1];
			break;
	}
	// watermark-procedure
	if($infos_img[2] == 2)
		$img_image = imagecreatefromjpeg($image);
	if($infos_img[2] == 3)
		$img_image = imagecreatefrompng($image);
	if($infos_wat[2] == 2)
		$img_watermark = imagecreatefromjpeg($watermark);
	if($infos_wat[2] == 3)
		$img_watermark = imagecreatefrompng($watermark);
	imagealphablending($img_image, TRUE);
	imagealphablending($img_watermark, TRUE);
	imagecolortransparent($img_watermark, imagecolorat($img_watermark, $t_x, $t_y));
	imagecopymerge($img_image, $img_watermark, $pos_x, $pos_y, 0, 0, $infos_wat[0], $infos_wat[1], $transparency);
	if(strtolower(substr($save_as, -3)) == "png") {
		if(imagepng($img_image, $save_as))
			return TRUE;
		else
			return FALSE;
	} else {
		if(imagejpeg($img_image, $save_as))
			return TRUE;
		else
			return FALSE;
	}
	return FALSE;
}

PHP:

I'm using a PNG 24-Bit with transparency. But after bringing the watermark png on the image ... the transparent area is also filled with the colour of the watermark picture (e.g. if my watermark picture is a yellow circle with transparent areas all around it ... the final watermarked picture doesn't show the yellow circle but a yellow rectangle => transparent areas aren't visible).

I think it must be the function, but I have no clue how I can get this to work?

Can anybody help me?

 

<?php

function watermark($SourceFile, $WatermarkFile, $SaveToFile = NULL)

{

    $watermark = @imagecreatefrompng($WatermarkFile) 


    or exit('Cannot open the watermark file.');

    imageAlphaBlending($watermark, false);

    imageSaveAlpha($watermark, true);

    $image_string = @file_get_contents($SourceFile) 


    or exit('Cannot open image file.');

    $image = @imagecreatefromstring($image_string)

    or exit('Not a valid image format.');

    $imageWidth=imageSX($image);

    $imageHeight=imageSY($image);


    $watermarkWidth=imageSX($watermark);

    $watermarkHeight=imageSY($watermark);

    $coordinate_X = ( $imageWidth - 5) - ( $watermarkWidth);


    $coordinate_Y = ( $imageHeight - 5) - ( $watermarkHeight);

    imagecopy($image, $watermark, $coordinate_X, $coordinate_Y, 


        0, 0, $watermarkWidth, $watermarkHeight);

    if(!($SaveToFile)) header('Content-Type: image/jpeg');

    imagejpeg ($image, $SaveToFile, 100);


    imagedestroy($image);

    imagedestroy($watermark);

    if(!($SaveToFile)) exit;

}
$SourceFile="path_of_the_sourcefile";
$WatermarkFile="Path_of_the_watermark_image";
watermark($SourceFile,$WatermarkFile);
?>

PHP:

this is script which i use to watermark, its working fine for me...if want just try this out...

 

Thanks, your script is working but with your script there's another problem: gradient fills are being removed ...