谁传一个上传自动生成缩略图的代码上来啊？

Question

听说ＰＨＰ可以不用组件实现～
ＡＳＰ得装组件｀｀所以我现在ＡＳＰ的程序打算来采用一个ＰＨＰ的上传头像代码～
来实现可以生成头像缩略图～麻烦哪个高手能给个代码～

Answer 1

function resizeimage($img, $wid, $hei,$c,$type="s",$qianzhui)
   {
       $this->srcimg = $img;
       $this->resize_width = $wid;
       $this->resize_height = $hei;
       $this->cut = $c;
   $this->th_path = $qianzhui;
       //图片的类型
       $this->type = substr(strrchr($this->srcimg,"."),1);
       //初始化图象
       $this->initi_img();
       //目标图象地址
        $this -> dst_img($type);
       //--
       $this->width = imagesx($this->im);
       $this->height = imagesy($this->im);
       //生成图象
       $this->newimg();
       ImageDestroy ($this->im);
   }
   function newimg()
   {
       //改变后的图象的比例
       $resize_ratio = ($this->resize_width)/($this->resize_height);
       //实际图象的比例
       $ratio = ($this->width)/($this->height);
       if(($this->cut)=="1")
       //裁图
       {
           if($ratio>=$resize_ratio)
           //高度优先
           {
               $newimg = imagecreatetruecolor($this->resize_width,$this->resize_height);
               imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width,$this->resize_height, (($this->height)*$resize_ratio), $this->height);
               ImageJpeg ($newimg,$this->dstimg);
           }
           if($ratio<$resize_ratio)
           //宽度优先
           {
               $newimg = imagecreatetruecolor($this->resize_width,$this->resize_height);
               imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width, $this->resize_height, $this->width, (($this->width)/$resize_ratio));
               ImageJpeg ($newimg,$this->dstimg);
           }
       }
       else
       //不裁图
       {
           if($ratio>=$resize_ratio)
           {
               $newimg = imagecreatetruecolor($this->resize_width,($this->resize_width)/$ratio);
               imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width, ($this->resize_width)/$ratio, $this->width, $this->height);
               ImageJpeg ($newimg,$this->dstimg);
           }
           if($ratio<$resize_ratio)
           {
               $newimg = imagecreatetruecolor(($this->resize_height)*$ratio,$this->resize_height);
               imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, ($this->resize_height)*$ratio, $this->resize_height, $this->width, $this->height);
               ImageJpeg ($newimg,$this->dstimg);
           }
       }
   }
   //初始化图象
   function initi_img()
   {
       if($this->type=="jpg")
       {
           $this->im = imagecreatefromjpeg($this->srcimg);
       }
       if($this->type=="gif")
       {
           $this->im = imagecreatefromgif($this->srcimg);
       }
       if($this->type=="png")
       {
           $this->im = imagecreatefrompng($this->srcimg);
       }
   }
   //图象目标地址
   function dst_img($type)
   {
      
       $name         = $this->srcimg;
   $n=substr(strrchr($name,"/"),1);
         $this->dstimg = $this->th_path.$n.".".$type.".".$this->type;
 
   }
}

Answer 2

$resizeimage =new resizeimage($attachment,$w,$h,"1",$type,$qianzhui);这是使用方法

Answer 3

给你个简单的下载PHP Thumbnailer Class v2.0代码
地址如下:
http://www.gen-x-design.com/projects/php-thumbnailer-class/例子代码:
include("class.Thumbnail.php");
$tn_image = new Thumbnail("sample.jpg", 300, 300, 0);
$tn_image->show(); 

Answer 4

$resizeimage =new resizeimage($attachment,$w,$h,"1",$type,$qianzhui);
attachment表示上传后的图片地址，$w表示缩略图的宽，$h是缩略图的高，1表示裁图，$type表示缩略图后缀，如ss.sd.jpg,sd就是后缀，$qianzhui表示缩略图存放地址，这回总明白了饿