php水印处理类中级篇

最新推荐文章于 2024-05-31 17:24:06 发布

创业程序员卡酷

最新推荐文章于 2024-05-31 17:24:06 发布

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分类专栏： PHP

本文链接：https://blog.youkuaiyun.com/gxrj11/article/details/51262820

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<?php

class imgwater{

   static $imgtype = array('jpeg','jpg','gif','bmp');


   private function checkimg($filename){
       $filename = trim($filename);
       if(!$filename){
           return false;
       }

       $img_exe = self::file_type($filename);
       if(!in_array($img_exe,self::$imgtype)){
           return -2;
       }
       return 1;
   }


   private function add_water($source,$water,$newimg){
       $source = trim($source);
       $water   = trim($water);
       $newimg = trim($newimg);
       if(!$source || !$water){
           return false;
       }

       $exe    = self::file_type($source);
       if(!$newimg){
           $pre    = time()."newsource";
           $newimg   = $pre.".".$exe;
       }

       $im       = imagecreatefromjpeg($source);
       $img2   = imagecreatefrompng($water);

       //取得各自的长宽，计算位置
       $im_WH   = getimagesize($source);
       $im_W   = $im_WH[0];
       $im_H   = $im_WH[1];

       $img2_WH= getimagesize($water);
       $img2_W = $img2_WH[0];
       $img2_H = $img2_WH[1];

       //定义存放的位置
       $NewX   = $im_W-$img2_W;
       $NewY   = $im_H-$img2_H;
       //填充
       imagecopy($im,$img2,$NewX,$NewY,0,0,$img2_W,$img2_H);
       //header("Content-type:image/jpeg");
       @unlink($newimg);
       switch ($exe){
           case 'jpg':
               imagejpeg($im,$newimg);break;
           case 'jpeg':
               imagejpeg($im,$newimg);break;
           case 'gif':
               imagegif($im,$newimg);break;
       }
   }


   private function file_type($filename){
       $file       = fopen($filename, "rb");
       $bin       = fread($file, 2); //只读2字节
       fclose($file);
       $strInfo   = @unpack("C2chars", $bin);
       $typeCode   = intval($strInfo['chars1'].$strInfo['chars2']);
       $fileType   = '';
       switch ($typeCode){
           case 7790:
               $fileType = 'exe';
               break;
           case 7784:
               $fileType = 'midi';
               break;
           case 8297:
               $fileType = 'rar';
               break;
           case 8075:
               $fileType = 'zip';
               break;
           case 255216:
               $fileType = 'jpg';
               break;
           case 7173:
               $fileType = 'gif';
               break;
           case 6677:
               $fileType = 'bmp';
               break;
           case 13780:
               $fileType = 'png';
               break;
           default:
               $fileType = 'unknown: '.$typeCode;
       }
       //Fix
       if ($strInfo['chars1']=='-1' AND $strInfo['chars2']=='-40' ) return 'jpg';
       if ($strInfo['chars1']=='-119' AND $strInfo['chars2']=='80' ) return 'png';
       return $fileType;
   }

   public function waterimg($filename,$waterimg,$newimg){

       $filename   = trim($filename);
       $waterimg   = trim($waterimg);
       $newimg      = trim($newimg);
       if(!$filename ||!$waterimg){
           return false;
       }
       $exerst = self::checkimg($filename);
       if($exerst==1){
           //加水印处理
           self::add_water($filename,$waterimg,$newimg);
       }
   }
}

$waterclass = new imgwater();

$imglist = array('1.jpg','2.jpg','3.jpg');
foreach($imglist as $key=>$value){
   $waterclass->waterimg($value,"yin.png","");
   sleep(3);
}
?>