PHP upload images and set transparent image watermark effect

$im = imagecreatefromjpeg ($_file["Upload" ["tmp_name"]);//Picture $watermark = Imagecreatefrompng ("Smiley.png"); The path of the watermark $im _x = Imagesx ($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 watermarked image //Use type to determine the type of the slice //switch ($_file["Upload" ["type"]) //case:1 //Other GD library functions //imagejpeg () corresponds to JPEG //imagegif () corresponds to GIF //imagepng () corresponds to PNG Imagedestroy ($im);

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