PHP图片上传加水印（转）

<? php
 
/* *****************************************************************************
 
参数说明:
$max_file_size  : 上传文件大小限制, 单位BYTE
$destination_folder : 上传文件路径
$watermark   : 是否附加水印(1为加水印,其他为不加水印);
 
***************************************************************************** */
 
// 上传文件类型列表
 
$uptypes = array (
     ' image/jpg ' ,  
     ' image/jpeg ' ,
     ' image/png ' ,
     ' image/pjpeg ' ,
     ' image/gif ' ,
     ' image/bmp ' ,
     ' image/x-png '
);
 
 
$max_file_size = 2000000 ;      // 上传文件大小限制, 单位BYTE
$destination_folder = " uploadimg/ " ;  // 上传文件路径
$watermark = 1 ;       // 是否附加水印(1为加水印,其他为不加水印);
$watertype = 1 ;       // 水印类型(1为文字,2为图片)
$waterposition = 1 ;      // 水印位置(1为左下角,2为右下角,3为左上角,4为右上角,5为居中);
$waterstring = " http://www.xplore.cn/ " ;   // 水印字符串
$waterimg = " xplore.gif " ;     // 水印图片
$imgpreview = 1 ;       // 是否生成预览图(1为生成,其他为不生成);
$imgpreviewsize = 1 / 2 ;     // 缩略图比例
 
?>
 
< html >
< head >
< title > ZwelL图片上传程序 </ title >
< style type = " text/css " >
<!--
body
{ 
     font - size :  9pt;
}
input
{ 
     background - color :   # 66CCFF;
     border :  1px inset  # CCCCCC;
}
-->
</ style >
</ head >
< body >
< form enctype = " multipart/form-data "  method = " post "  name = " upform " >
  上传文件 :
   < input name = " upfile "  type = " file " >
   < input type = " submit "  value = " 上传 " >< br >
  允许上传的文件类型为 :<?= implode ( ' ,  ' , $uptypes ) ?>
</ form >
<? php
if  ( $_SERVER [ ' REQUEST_METHOD ' ]  ==   ' POST ' )
{ 
     if  ( ! is_uploaded_file ( $_FILES [ " upfile " ][tmp_name]))
     // 是否存在文件
    { 
          echo   " 图片不存在! " ;
          exit ;
    }
     $file   =   $_FILES [ " upfile " ];
 
     if ( $max_file_size   <   $file [ " size " ])
     // 检查文件大小
    { 
         echo   " 文件太大! " ;
         exit ;
    }
 
     if ( ! in_array ( $file [ " type " ] ,   $uptypes ))
     // 检查文件类型
    { 
         echo   " 文件类型不符! " . $file [ " type " ];
         exit ;
    }
 
     if ( ! file_exists ( $destination_folder ))
    { 
         mkdir ( $destination_folder );
    }
 
     $filename = $file [ " tmp_name " ];
     $image_size   =   getimagesize ( $filename );
     $pinfo = pathinfo ( $file [ " name " ]);
     $ftype = $pinfo [ ' extension ' ];
     $destination   =   $destination_folder . time () . " . " . $ftype ;
 
     if  ( file_exists ( $destination )  &&   $overwrite   !=   true )
    { 
         echo   " 同名文件已经存在了 " ;
         exit ;
    }
 
     if ( ! move_uploaded_file  ( $filename ,   $destination ))
    { 
         echo   " 移动文件出错 " ;
         exit ;
    }
 
     $pinfo = pathinfo ( $destination );
     $fname = $pinfo [ basename ];
 
     echo   "  < font color=red>已经成功上传</font><br>文件名:  <font color= blue> " . $destination_folder . $fname . " </font><br> " ;
     echo   "  宽度: " . $image_size [ 0 ];
     echo   "  长度: " . $image_size [ 1 ];
     echo   " <br> 大小: " . $file [ " size " ] . "  bytes " ;
 
     if ( $watermark == 1 )
    { 
         $iinfo = getimagesize ( $destination , $iinfo );
         $nimage = imagecreatetruecolor( $image_size [ 0 ] , $image_size [ 1 ]);
         $white = imagecolorallocate( $nimage , 255 , 255 , 255 );
         $black = imagecolorallocate( $nimage , 0 , 0 , 0 );
         $red = imagecolorallocate( $nimage , 255 , 0 , 0 );
        imagefill( $nimage , 0 , 0 , $white );
         switch  ( $iinfo [ 2 ])
        { 
             case   1 :
             $simage   = imagecreatefromgif( $destination );
             break ;
 
             case   2 :
             $simage   = imagecreatefromjpeg( $destination );
             break ;
 
             case   3 :
             $simage   = imagecreatefrompng( $destination );
             break ;
 
             case   6 :
             $simage   = imagecreatefromwbmp( $destination );
             break ;
 
             default :
             die ( " 不支持的文件类型 " );
             exit ;
         }
 
        imagecopy( $nimage , $simage , 0 , 0 , 0 , 0 , $image_size [ 0 ] , $image_size [ 1 ]);
        imagefilledrectangle( $nimage , 1 , $image_size [ 1 ] - 15 , 80 , $image_size [ 1 ] , $white );
 
         switch ( $watertype )
        { 
             case   1 :     // 加水印字符串
            imagestring( $nimage , 2 , 3 , $image_size [ 1 ] - 15 , $waterstring , $black );
             break ;
 
             case   2 :     // 加水印图片
             $simage1   = imagecreatefromgif( " xplore.gif " );
            imagecopy( $nimage , $simage1 , 0 , 0 , 0 , 0 , 85 , 15 );
            imagedestroy( $simage1 );
             break ;
         }
 
         switch  ( $iinfo [ 2 ])
        { 
             case   1 :
             // imagegif($nimage, $destination);
            imagejpeg( $nimage ,   $destination );
             break ;
 
             case   2 :
            imagejpeg( $nimage ,   $destination );
             break ;
 
             case   3 :
            imagepng( $nimage ,   $destination );
             break ;
 
             case   6 :
            imagewbmp( $nimage ,   $destination );
             // imagejpeg($nimage, $destination);
             break ;
         }
 
         // 覆盖原上传文件
        imagedestroy( $nimage );
        imagedestroy( $simage );
    }
 
     if ( $imgpreview == 1 )
    { 
         echo   " <br>图片预览:<br> " ;
         echo   " <img src=" " . $destination . " " width= " . ( $image_size [ 0 ] * $imgpreviewsize ) . "  height= " . ( $image_size [ 1 ] * $imgpreviewsize );
         echo   "  alt="图片预览: 文件名: " . $destination . " 上传时间:"> " ;
    }
 
}
 
?>
</ body >
</ html >