PHP upload images and make transparent watermark code

$im = Imagecreatefromjpeg ($_file["Upload" ["tmp_name"]); You want to take a picture of the example $watermark = Imagecreatefrompng ("Smiley.png"); Path of the watermark map $im _x = Imagesx ($im); $im _y = Imagesy ($im); $w _x = Imagesx ($watermark); $w _y = Imagesy ($watermark); Imagecopy ($im, $watermark, $im _x-$w _x, $im _y-$w _y,0,0, $w _x, $w _y); Imagejpeg ($im); You can add a path to save a watermark map. The type can be used to determine the genre Switch ($_file["Upload" ["type"]) Case:1 And then use different functions. Imagejpeg () corresponds to JPEG Imagegif () corresponds to GIF Imagepng () corresponds to PNG Imagedestroy ($im); Copy Code

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