PHP: Converting png's and gif's into grayscale

Question

im using the following script to convert jpgs into grayscale-images. http://bubble.ro/How_to_convert_an_image_to_grayscale_using_PHP.html

i want to upgrade it to also co

Answer 1

$image = ImageCreateFromString(file_get_contents('/path/to/image.ext'));

ImageFilter($image, IMG_FILTER_GRAYSCALE);

ImageGIF($image); // or ImagePNG($image);