php 图片添加文字水印并添加文字阴影

<?php
$images = new Imagick(glob('images/*.JPG'));
foreach($images as $image) {
// Providing 0 forces thumbnailImage to maintain aspect ratio
$image->thumbnailImage(1024,0);
}
$images->writeImages();
?>

<?php
/* Create a new imagick object and read in GIF */
$im = new Imagick("example.gif");
/* Resize all frames */
foreach ($im as $frame) {
/* 50x50 frames */
$frame->thumbnailImage(50, 50);
/* Set the virtual canvas to correct size */
$frame->setImagePage(50, 50, 0, 0);
}/* Notice writeImages instead of writeImage */
$im->writeImages("example_small.gif", true);
?>

include 'imagick.class.php';

$image = new lib_image_imagick();

$image->open('a.gif');
$image->resize_to(100, 100, 'scale_fill');
$image->add_text('1024i.com', 10, 20);
$image->add_watermark('1024i.gif', 10, 50);
$image->save_to('x.gif');

<?php

class lib_image_imagick
{
 private $image = null;
 private $type = null;

 // 构造函数
 public function __construct(){}

 // 析构函数
 public function __destruct()
 {
     if($this->image!==null) $this->image->destroy();
 }

 // 载入图像
 public function open($path)
 {
  $this->image = new Imagick( $path );
  if($this->image)
  {
      $this->type = strtolower($this->image->getImageFormat());
  }
  return $this->image;
 }
 

 public function crop($x=0, $y=0, $width=null, $height=null)
 {
     if($width==null) $width = $this->image->getImageWidth()-$x;
     if($height==null) $height = $this->image->getImageHeight()-$y;
     if($width<=0 || $height<=0) return;
    
     if($this->type=='gif')
     {
            $image = $this->image;
         $canvas = new Imagick();
        
         $images = $image->coalesceImages();
         foreach($images as $frame){
             $img = new Imagick();
             $img->readImageBlob($frame);
                $img->cropImage($width, $height, $x, $y);

                $canvas->addImage( $img );
                $canvas->setImageDelay( $img->getImageDelay() );
                $canvas->setImagePage($width, $height, 0, 0);
            }
           
            $image->destroy();
         $this->image = $canvas;
     }
     else
     {
         $this->image->cropImage($width, $height, $x, $y);
     }
 }

 /*
 * 更改图像大小
 $fit: 适应大小方式
 'force': 把图片强制变形成 $width X $height 大小
 'scale': 按比例在安全框 $width X $height 内缩放图片, 输出缩放后图像大小 不完全等于 $width X $height
 'scale_fill': 按比例在安全框 $width X $height 内缩放图片，安全框内没有像素的地方填充色, 使用此参数时可设置背景填充色 $bg_color = array(255,255,255)(红,绿,蓝, 透明度) 透明度(0不透明-127完全透明))
 其它: 智能模能 缩放图像并载取图像的中间部分 $width X $height 像素大小
 $fit = 'force','scale','scale_fill' 时： 输出完整图像
 $fit = 图像方位值 时, 输出指定位置部分图像
 字母与图像的对应关系如下:
 
 north_west   north   north_east
 
 west         center        east
 
 south_west   south   south_east
 
 */
 public function resize_to($width = 100, $height = 100, $fit = 'center', $fill_color = array(255,255,255,0) )
 {
    
     switch($fit)
     {
         case 'force':
             if($this->type=='gif')
             {
                 $image = $this->image;
                 $canvas = new Imagick();
                
                 $images = $image->coalesceImages();
                 foreach($images as $frame){
                     $img = new Imagick();
                     $img->readImageBlob($frame);
                        $img->thumbnailImage( $width, $height, false );

                        $canvas->addImage( $img );
                        $canvas->setImageDelay( $img->getImageDelay() );
                    }
                    $image->destroy();
                 $this->image = $canvas;
             }
             else
             {
                 $this->image->thumbnailImage( $width, $height, false );
             }
             break;
         case 'scale':
             if($this->type=='gif')
             {
                 $image = $this->image;
                 $images = $image->coalesceImages();
                 $canvas = new Imagick();
                 foreach($images as $frame){
                     $img = new Imagick();
                     $img->readImageBlob($frame);
                        $img->thumbnailImage( $width, $height, true );

                        $canvas->addImage( $img );
                        $canvas->setImageDelay( $img->getImageDelay() );
                    }
                    $image->destroy();
                 $this->image = $canvas;
             }
             else
             {
                 $this->image->thumbnailImage( $width, $height, true );
             }
             break;
         case 'scale_fill':
             $size = $this->image->getImagePage();
             $src_width = $size['width'];
             $src_height = $size['height'];
            
                $x = 0;
                $y = 0;
               
                $dst_width = $width;
                $dst_height = $height;

       if($src_width*$height > $src_height*$width)
    {
     $dst_height = intval($width*$src_height/$src_width);
     $y = intval( ($height-$dst_height)/2 );
    }
    else
    {
     $dst_width = intval($height*$src_width/$src_height);
     $x = intval( ($width-$dst_width)/2 );
    }

                $image = $this->image;
                $canvas = new Imagick();
               
                $color = 'rgba('.$fill_color[0].','.$fill_color[1].','.$fill_color[2].','.$fill_color[3].')';
             if($this->type=='gif')
             {
                 $images = $image->coalesceImages();
                 foreach($images as $frame)
                 {
                     $frame->thumbnailImage( $width, $height, true );

                     $draw = new ImagickDraw();
                        $draw->composite($frame->getImageCompose(), $x, $y, $dst_width, $dst_height, $frame);

                        $img = new Imagick();
                        $img->newImage($width, $height, $color, 'gif');
                        $img->drawImage($draw);

                        $canvas->addImage( $img );
                        $canvas->setImageDelay( $img->getImageDelay() );
                        $canvas->setImagePage($width, $height, 0, 0);
                    }
             }
             else
             {
                 $image->thumbnailImage( $width, $height, true );
                
                 $draw = new ImagickDraw();
                    $draw->composite($image->getImageCompose(), $x, $y, $dst_width, $dst_height, $image);
                   
                 $canvas->newImage($width, $height, $color, $this->get_type() );
                    $canvas->drawImage($draw);
                    $canvas->setImagePage($width, $height, 0, 0);
             }
             $image->destroy();
             $this->image = $canvas;
             break;
   default:
    $size = $this->image->getImagePage();
       $src_width = $size['width'];
             $src_height = $size['height'];
            
                $crop_x = 0;
                $crop_y = 0;
               
                $crop_w = $src_width;
                $crop_h = $src_height;
               
          if($src_width*$height > $src_height*$width)
    {
     $crop_w = intval($src_height*$width/$height);
    }
    else
    {
        $crop_h = intval($src_width*$height/$width);
    }
               
       switch($fit)
             {
        case 'north_west':
            $crop_x = 0;
            $crop_y = 0;
            break;
           case 'north':
               $crop_x = intval( ($src_width-$crop_w)/2 );
               $crop_y = 0;
               break;
           case 'north_east':
               $crop_x = $src_width-$crop_w;
               $crop_y = 0;
               break;
           case 'west':
               $crop_x = 0;
               $crop_y = intval( ($src_height-$crop_h)/2 );
               break;
           case 'center':
               $crop_x = intval( ($src_width-$crop_w)/2 );
               $crop_y = intval( ($src_height-$crop_h)/2 );
               break;
           case 'east':
               $crop_x = $src_width-$crop_w;
               $crop_y = intval( ($src_height-$crop_h)/2 );
               break;
           case 'south_west':
               $crop_x = 0;
               $crop_y = $src_height-$crop_h;
               break;
           case 'south':
               $crop_x = intval( ($src_width-$crop_w)/2 );
               $crop_y = $src_height-$crop_h;
               break;
           case 'south_east':
               $crop_x = $src_width-$crop_w;
               $crop_y = $src_height-$crop_h;
               break;
           default:
               $crop_x = intval( ($src_width-$crop_w)/2 );
               $crop_y = intval( ($src_height-$crop_h)/2 );
             }
            
             $image = $this->image;
             $canvas = new Imagick();
            
          if($this->type=='gif')
             {
                 $images = $image->coalesceImages();
                 foreach($images as $frame){
                     $img = new Imagick();
                     $img->readImageBlob($frame);
                        $img->cropImage($crop_w, $crop_h, $crop_x, $crop_y);
                        $img->thumbnailImage( $width, $height, true );
                       
                        $canvas->addImage( $img );
                        $canvas->setImageDelay( $img->getImageDelay() );
                        $canvas->setImagePage($width, $height, 0, 0);
                    }
             }
             else
             {
                 $image->cropImage($crop_w, $crop_h, $crop_x, $crop_y);
                 $image->thumbnailImage( $width, $height, true );
                 $canvas->addImage( $image );
                 $canvas->setImagePage($width, $height, 0, 0);
             }
             $image->destroy();
             $this->image = $canvas;
     }
    
 }
 

 // 添加水印图片
 public function add_watermark($path, $x = 0, $y = 0)
 {
        $watermark = new Imagick($path);
        $draw = new ImagickDraw();
        $draw->composite($watermark->getImageCompose(), $x, $y, $watermark->getImageWidth(), $watermark->getimageheight(), $watermark);

     if($this->type=='gif')
     {
         $image = $this->image;
            $canvas = new Imagick();
         $images = $image->coalesceImages();
         foreach($image as $frame)
         {
                $img = new Imagick();
             $img->readImageBlob($frame);
                $img->drawImage($draw);
               
                $canvas->addImage( $img );
                $canvas->setImageDelay( $img->getImageDelay() );
            }
            $image->destroy();
         $this->image = $canvas;
     }
     else
     {
         $this->image->drawImage($draw);
     }
 }

 
 // 添加水印文字
 public function add_text($text, $x = 0 , $y = 0, $angle=0, $style=array())
 {
        $draw = new ImagickDraw();
        if(isset($style['font'])) $draw->setFont($style['font']);
        if(isset($style['font_size'])) $draw->setFontSize($style['font_size']);
     if(isset($style['fill_color'])) $draw->setFillColor($style['fill_color']);
     if(isset($style['under_color'])) $draw->setTextUnderColor($style['under_color']);
    
     if($this->type=='gif')
     {
         foreach($this->image as $frame)
         {
             $frame->annotateImage($draw, $x, $y, $angle, $text);
         }
     }
     else
     {
         $this->image->annotateImage($draw, $x, $y, $angle, $text);
     }
 }
 
 
 // 保存到指定路径
 public function save_to( $path )
 {
     if($this->type=='gif')
     {
         $this->image->writeImages($path, true);
     }
     else
     {
         $this->image->writeImage($path);
     }
 }

 // 输出图像
 public function output($header = true)
 {
     if($header) header('Content-type: '.$this->type);
     echo $this->image->getImagesBlob();  
 }

 
 public function get_width()
 {
        $size = $this->image->getImagePage();
        return $size['width'];
 }
 
 public function get_height()
 {
     $size = $this->image->getImagePage();
        return $size['height'];
 }

 // 设置图像类型， 默认与源类型一致
 public function set_type( $type='png' )
 {
     $this->type = $type;
        $this->image->setImageFormat( $type );
 }

 // 获取源图像类型
 public function get_type()
 {
  return $this->type;
 }

 // 当前对象是否为图片
 public function is_image()
 {
  if( $this->image )
   return true;
  else
   return false;
 }
 

 public function thumbnail($width = 100, $height = 100, $fit = true){ $this->image->thumbnailImage( $width, $height, $fit );} // 生成缩略图 $fit为真时将保持比例并在安全框 $width X $height 内生成缩略图片

 /*
 添加一个边框
 $width: 左右边框宽度
 $height: 上下边框宽度
 $color: 颜色: RGB 颜色 'rgb(255,0,0)' 或 16进制颜色 '#FF0000' 或颜色单词 'white'/'red'...
 */
 public function border($width, $height, $color='rgb(220, 220, 220)')
 {
  $color=new ImagickPixel();
  $color->setColor($color);
  $this->image->borderImage($color, $width, $height);
 }
 
 public function blur($radius, $sigma){$this->image->blurImage($radius, $sigma);} // 模糊
 public function gaussian_blur($radius, $sigma){$this->image->gaussianBlurImage($radius, $sigma);} // 高斯模糊
 public function motion_blur($radius, $sigma, $angle){$this->image->motionBlurImage($radius, $sigma, $angle);} // 运动模糊
 public function radial_blur($radius){$this->image->radialBlurImage($radius);} // 径向模糊

 public function add_noise($type=null){$this->image->addNoiseImage($type==null?imagick::NOISE_IMPULSE:$type);} // 添加噪点
 
 public function level($black_point, $gamma, $white_point){$this->image->levelImage($black_point, $gamma, $white_point);} // 调整色阶
 public function modulate($brightness, $saturation, $hue){$this->image->modulateImage($brightness, $saturation, $hue);} // 调整亮度、饱和度、色调

 public function charcoal($radius, $sigma){$this->image->charcoalImage($radius, $sigma);} // 素描
 public function oil_paint($radius){$this->image->oilPaintImage($radius);} // 油画效果
 
 public function flop(){$this->image->flopImage();} // 水平翻转
 public function flip(){$this->image->flipImage();} // 垂直翻转

}

<?php
 
echo img_water_mark("1.jpg","walter.gif",null,"2.jpg",5,80);
 
/**
 * 图片加水印（适用于png/jpg/gif格式）
 *
 * @author flynetcn
 *
 * @param $srcImg    原图片
 * @param $waterImg  水印图片
 * @param $savepath  保存路径
 * @param $savename  保存名字
 * @param $positon   水印位置
 *                   1:顶部居左, 2:顶部居右, 3:居中, 4:底部局左, 5:底部居右
 * @param $alpha     透明度 -- 0:完全透明, 100:完全不透明
 *
 * @return 成功 -- 加水印后的新图片地址
 *      失败 -- -1:原文件不存在, -2:水印图片不存在, -3:原文件图像对象建立失败
 *              -4:水印文件图像对象建立失败 -5:加水印后的新图片保存失败
 */
function img_water_mark($srcImg, $waterImg, $savepath=null, $savename=null, $positon=5, $alpha=30)
{
 $temp = pathinfo($srcImg);
 $name = $temp[basename];
 $path = $temp[dirname];
 $exte = $temp[extension];
 $savename = $savename ? $savename : $name;
 $savepath = $savepath ? $savepath : $path;
 $savefile = $savepath ."/". $savename;
 $srcinfo = @getimagesize($srcImg);
 if (!$srcinfo) {
  return -1;  //原文件不存在
 }
 $waterinfo = @getimagesize($waterImg);
 if (!$waterinfo) {
  return -2;  //水印图片不存在
 }
 $srcImgObj = image_create_from_ext($srcImg);
 if (!$srcImgObj) {
  return -3;  //原文件图像对象建立失败
 }
 $waterImgObj = image_create_from_ext($waterImg);
 if (!$waterImgObj) {
  return -4;  //水印文件图像对象建立失败
 }
 switch ($positon) {
 //1顶部居左
 case 1: $x=$y=0; break;
 //2顶部居右
 case 2: $x = $srcinfo[0]-$waterinfo[0]; $y = 0; break;
 //3居中
 case 3: $x = ($srcinfo[0]-$waterinfo[0])/2; $y = ($srcinfo[1]-$waterinfo[1])/2; break;
 //4底部居左
 case 4: $x = 0; $y = $srcinfo[1]-$waterinfo[1]; break;
 //5底部居右
 case 5: $x = $srcinfo[0]-$waterinfo[0]; $y = $srcinfo[1]-$waterinfo[1]; break;
 default: $x=$y=0;
 }
 imagecopymerge($srcImgObj, $waterImgObj, $x, $y, 0, 0, $waterinfo[0], $waterinfo[1], $alpha);
 switch ($srcinfo[2]) {
 case 1: imagegif($srcImgObj, $savefile); break;
 case 2: imagejpeg($srcImgObj, $savefile); break;
 case 3: imagepng($srcImgObj, $savefile); break;
 default: return -5;  //保存失败
 }
 imagedestroy($srcImgObj);
 imagedestroy($waterImgObj);
 return $savefile;
}
 
function image_create_from_ext($imgfile)
{
 $info = getimagesize($imgfile);
 $im = null;
 switch ($info[2]) {
 case 1: $im=imagecreatefromgif($imgfile); break;
 case 2: $im=imagecreatefromjpeg($imgfile); break;
 case 3: $im=imagecreatefrompng($imgfile); break;
 }
 return $im;
}

if($pic = watermark('./image.jpg','./watermark.png'))
{
    echo '<img src="' . $pic . '" border=0 />' ;
}
else
{
    echo '<img src="./image.jpg" border=0 />';
}

<?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);  

使用说明:  
1. 将PHP.INI文件里面的"extension=php_gd2.dll"一行前面的;号去掉,因为我们要用到GD库;  
2. 将extension_dir =改为你的php_gd2.dll所在目录;  
**************************************************************/  

//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.111cn.net/";  //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=1/1;    //缩略图比例  
?>  
<html>  
<head>  
<title>图片打水印程序演示!WWW.MOP8.COM</title>  
<style type="text/css">  
<!--  
body  
{  
    font-size: 9pt;  
}  
input  
{  
    background-color: #66CCFF;  
    border: 1px inset #CCCCCC;  
}  
-->  
</style>  
</head>  

<body>  
<center> 
<form enctype="multipart/form-data" method="post" name="upform">  
 上传文件:  
 <input name="upfile" type="file">  
 <input type="submit" value="上传"><P>  
 允许上传的文件类型为:<?=implode(', ',$uptypes)?>  
</form>  
<FONT COLOR="#FF0000">本演示空间由TuWoo提供,本程序采用文字水印的方式.</FONT></CENTER> 
<?php  
if ($_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:r文件名:".$destination."r上传时间:">";  
   }  
}  
?>  
</body>  
</html>

<?php
if(extension_loaded('gd')) {
  echo '你可以使用gd<br>';
  foreach(gd_info() as $cate=>$value)
    echo "$cate: $value<br>";
}else
  echo '你没有安装gd扩展';
?>

<?php
/**
 * vCode(m,n,x,y) m个数字  显示大小为n   边宽x   边高y
 * 自己改写记录session $code
 */
session_start();
vCode(4, 15); //4个数字，显示大小为15

function vCode($num = 4, $size = 20, $width = 0, $height = 0) {
 !$width && $width = $num * $size * 4 / 5 + 5;
 !$height && $height = $size + 10;
 // 去掉了 0 1 O l 等
 $str = "23456789abcdefghijkmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVW";
 $code = '';
 for ($i = 0; $i < $num; $i++) {
  $code .= $str[mt_rand(0, strlen($str)-1)];
 }
 // 画图像
 $im = imagecreatetruecolor($width, $height);
 // 定义要用到的颜色
 $back_color = imagecolorallocate($im, 235, 236, 237);
 $boer_color = imagecolorallocate($im, 118, 151, 199);
 $text_color = imagecolorallocate($im, mt_rand(0, 200), mt_rand(0, 120), mt_rand(0, 120));
 // 画背景
 imagefilledrectangle($im, 0, 0, $width, $height, $back_color);
 // 画边框
 imagerectangle($im, 0, 0, $width-1, $height-1, $boer_color);
 // 画干扰线
 for($i = 0;$i < 5;$i++) {
  $font_color = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
  imagearc($im, mt_rand(- $width, $width), mt_rand(- $height, $height), mt_rand(30, $width * 2), mt_rand(20, $height * 2), mt_rand(0, 360), mt_rand(0, 360), $font_color);
 }
 // 画干扰点
 for($i = 0;$i < 50;$i++) {
  $font_color = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
  imagesetpixel($im, mt_rand(0, $width), mt_rand(0, $height), $font_color);
 }
 // 画验证码
 @imagefttext($im, $size , 0, 5, $size + 3, $text_color, 'c:\WINDOWS\Fonts\simsun.ttc', $code);
 $_SESSION["VerifyCode"]=$code;
 header("Cache-Control: max-age=1, s-maxage=1, no-cache, must-revalidate");
 header("Content-type: image/png;charset=gb2312");
 imagepng($im);
 imagedestroy($im);
}

?>