Использование:
$thumbnail = new thumbnail;
$thumbnail->open_save(\'1.jpg\', \'copy.jpgf\', $size, 2);
$size = размер полученной картинки.

                        
class thumbnail 

 { 

 var $imgfile; 

  

 function thumb($imgfile) 

 { 

    if (!file_exists($imgfile)) die ("Cannot read the file!"); 

   //detect image format 

 //$this->img["format"] = ereg_replace(".*\.(.*)$","\\1",$imgfile); 

   $hz = explode(".", $name); 

   $this->img["format"] = $hz[sizeof($hz-1)]; 

   $this->img["format"] = strtoupper($this->img["format"]); 

   if ($this->img["format"]=="JPG" || $this->img["format"]=="JPEG") 

   { 

      //JPEG 

     $this->img["format"]="JPG"; 

     $this->img["src"] = ImageCreateFromJPEG($imgfile); 

   } 

   elseif ($this->img["format"]=="PNG") 

   { 

      //PNG 

      $this->img["format"]="PNG"; 

      $this->img["src"] = ImageCreateFromPNG($imgfile); 

   } 

   elseif ($this->img["format"]=="GIF") 

   { 

      //GIF 

      $this->img["format"]="GIF"; 

      $this->img["src"] = ImageCreateFromGIF($imgfile); 

  

 } 

  else { 

 //DEFAULT 

 echo "Not Supported File! Thumbnails can only be made from .gif, .jpg and .png images!"; 

 exit(); 

 } 

 $this->img["lebar"] = imagesx($this->img["src"]); 

 $this->img["tinggi"] = imagesy($this->img["src"]); 

 //default quality jpeg 

 $this->img["quality"]=100; 

 } 

  

 function size_auto($size=100) 

 { 

   //size 

   if ($this->img["lebar"]>=$this->img["tinggi"]) 

   { 

     $this->img["lebar_thumb"]=$size; 

     $this->img["tinggi_thumb"] = ($this->img["lebar_thumb"]/$this->img["lebar"])*$this->img["tinggi"]; 

   } 

   else 

   { 

     $this->img["tinggi_thumb"]=$size; 

     $this->img["lebar_thumb"] = ($this->img["tinggi_thumb"]/$this->img["tinggi"])*$this->img["lebar"]; 

   } 

 } 

  

 function jpeg_quality($quality=100) 

 { 

 //jpeg quality 

 $this->img["quality"]=$quality; 

 } 

  

  

  

 function show($gd_version) 

 { 

   Header("Content-Type: image/".$this->img["format"]); 

   if($gd_version==2) 

   { 

      $this->img["des"] = imagecreatetruecolor($this->img["lebar_thumb"],$this->img["tinggi_thumb"]); 

      imagecopyresampled ($this->img["des"], $this->img["src"], 0, 0, 0, 0, $this->img["lebar_thumb"],$this->img["tinggi_thumb"], $this->img["lebar"], $this->img["tinggi"]); 

   } 

   if($gd_version==1) 

   { 

      $this->img["des"] = imagecreate($this->img["lebar_thumb"],$this->img["tinggi_thumb"]); 

      imagecopyresized ($this->img["des"], $this->img["src"], 0, 0, 0, 0, $this->img["lebar_thumb"],$this->img["tinggi_thumb"], $this->img["lebar"], $this->img["tinggi"]); 

   } 

   if ($this->img["format"]=="JPG" || $this->img["format"]=="JPEG") 

   { 

      //JPEG 

      imageJPEG($this->img["des"],"",$this->img["quality"]); 

   } 

   elseif ($this->img["format"]=="PNG") 

   { 

      //PNG 

      imagePNG($this->img["des"]); 

   } 

   elseif ($this->img["format"]=="GIF") 

   { 

      //GIF 

      imageGIF($this->img["des"]); 

   } 

 } 

  

 function save($save="",$gd_version) 

 { 

  

        if($gd_version==2) 

        { 

           $this->img["des"] = imagecreatetruecolor($this->img["lebar_thumb"],$this->img["tinggi_thumb"]); 

           @imagecopyresampled ($this->img["des"], $this->img["src"], 0, 0, 0, 0, $this->img["lebar_thumb"], $this->img["tinggi_thumb"], $this->img["lebar"], $this->img["tinggi"]); 

        } 

        if($gd_version==1) 

        { 

           $this->img["des"] = imagecreate($this->img["lebar_thumb"],$this->img["tinggi_thumb"]); 

           @imagecopyresized ($this->img["des"], $this->img["src"], 0, 0, 0, 0, $this->img["lebar_thumb"],     $this->img["tinggi_thumb"], $this->img["lebar"], $this->img["tinggi"]); 

        } 

        if ($this->img["format"]=="JPG" || $this->img["format"]=="JPEG") 

        { 

           //JPEG 

           imageJPEG($this->img["des"],"$save",$this->img["quality"]); 

        } 

        elseif ($this->img["format"]=="PNG") 

        { 

            //PNG 

            imagePNG($this->img["des"],"$save"); 

        } 

        elseif ($this->img["format"]=="GIF") 

        { 

            //GIF 

            imageGIF($this->img["des"],"$save"); 

        } 

 } 

  

  

    function open_save($open, $save, $size, $gd) 

    { 

       $this->thumb($open); 

       $this->size_auto($size); 

       $this->save($save, $gd); 

    } 

  

 }