上载png图片变黑

Question

I have searched the web and found many treads on this one, but i can not find a solution for my issue.

I'm able to upload jpg and jpeg files, but when uploading png files, they turn out black.

This is my code for uploading the png files:

$dest_image = imagecreatetruecolor($width, $height); 

if($image_extension == ".png"){
        $source_image = imagecreatefrompng($temp_png_file); 
        imagecopyresampled($dest_image, $source_image, 0, 0, 0, 0, $width, $height, $width, $height); 
        imagepng($dest_image, $folder.$new_name);
}

Thanks

Answer 1

I found the problem, It was because of a mysql_real_escape_string() function than created the wrong value for $temp_png_file. Also, i had a problematic if() statement...

Twice my own mistake :-/