PHP hit watermark function

    / ** 
     * @param $ str need to play text watermark 
     * @param int $ size text size 
     @param int $ red text color rgb r * 
     * @param int $ G GREE text color rgb 
     * @param int $ Blue text B color RGB 
     * @param string $ path generated after the image path 
     * @author Ningjia Bing 
     * / 
    function Watermark (STR $, $ size = 48, Red = $ 150, $ GREE = 150, Blue = $ 150, $ = path '/ the Uploads / the FS / photo_stamp.png') { 
        $ imagecreatefrompng IM = (the STATIC __ __ '/ images / lucency.png');. // introducing transparent image 
        $ font = __STATIC __ "/ fonts / msyh.ttf".; // font files introduced 
        // create a watermark image manually from GD 
        $ = Stamp as imagecreatetruecolor (2480, 3508); 
        // set the font background 
        imagefilledrectangle ($ stamp, 0, 0 , 2480, 3508, 0xFFFFFF);
        Color = imagecolorallocate $ ($ Stamp, Red $, $ GREE, $ Blue);
        // played full screen 
        for (I $ =. 1; $ I <25; $ I ++) { 
            imagefttext (Stamp $, $ size, 50,0,150 * I $, $ Color, $ font, STR $); 

            for ($ J =. 1; $ J <15; $ J ++) { 
                imagefttext ($ Stamp, $ size, 50,200 * $ J, 150 * $ I, $ Color, $ font, $ STR); 
            } 
        } 

        // combined with 50% transparency watermark and image 
        imagecopymerge ($ IM, $ Stamp, 0, 0, 0, 0, imagesx ($ Stamp), imagesy ($ Stamp), 20); 
        // save the image to a file, and frees up memory watermark 
        imagepng ($ im , $ path); 
        imagedestroy ($ IM); 
    }