<?php   /**    * 圖片添加水印    * $target 源文件路徑    * $wtrmrk_file 水印圖片路徑    * $newcopy 添加水印后的圖片路徑    *    */   public function watermark_image($target, $wtrmrk_file, $newcopy) {     $watermark = imagecreatefrompng($wtrmrk_file);     imagealphablending($watermark, false);     imagesavealpha($watermark, true);     $img = imagecreatefromjpeg($target);     $img_w = imagesx($img);     $img_h = imagesy($img);     $wtrmrk_w = imagesx($watermark);     $wtrmrk_h = imagesy($watermark);     $dst_x = ($img_w ) – ($wtrmrk_w); // For centering the watermark on any image //phpfensi.com     $dst_y = ($img_h) – ($wtrmrk_h ); // For centering the watermark on any image     imagecopy($img, $watermark, $dst_x, $dst_y, 0, 0, $wtrmrk_w, $wtrmrk_h);          imagejpeg($img, $newcopy, 100);     imagedestroy($img);     imagedestroy($watermark);     //return $img;   } ?>