Aphp adds watermark to pictures and uploads pictures to add watermark php class.
Function: PHP image watermark (watermark supports images or text)
$groundImage background image, that is, the image that needs to be watermarked, currently only supports GIF, JPG, and PNG formats;
$waterImage Image watermark, that is, the image used as a watermark, currently only supports GIF, JPG, and PNG formats;
$waterText text watermark, that is, text is used as a watermark, supports ASCII code, does not support Chinese; ##
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