I had a work, when the customer wanted to add watermark to the uploaded images. I tried some solutions, and finally found that one, what works well. What we need for this task? A png image what contains the watermark image. This must be transparent background, and semi transparent image, otherwise the result won’t be watermark, just an image what merged with another. We need a form too, to upload the image, and a script, what process the request, and add the watermark to the uploaded image.

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