php支持生成缩略图文件上传代码

class image{
        public $filename;
        private $info;
        private $im;
  

//构造
        public function __construct($filename){
                $this->filename = $filename;
                $this->info    = @getimagesize($filename);
    if($this->info[2]>3){echo "只支持gif、jpeg、png 格式。";exit;}
  
        }
       
// 载入
        public function imgload(){
   switch($this->info[2]){
    case 1:
    $this->im=@imagecreatefromgif($this->filename);
    break; 
    case 2:
    $this->im=@imagecreatefromjpeg($this->filename);
    break; 
    case 3:
    $this->im=@imagecreatefrompng($this->filename);
    break; 
   }
        }

// 保存
        public function imagesave($img,$savename,$inf){
   switch($inf){
    case 1:
    imagegif($img,$savename);;
    break; 
    case 2:
    imagejpeg($img,$savename);;
    break; 
    case 3:
    imagepng($img,$savename);;
    break; 
   }
        }  

  
//滤镜
 public function filter($arg=1,$savename=''){
  $this->imgload();
  
  if($savename=='')$savename='f_'.$this->filename;
     $ok=false;
     switch($arg){
   case 1:
   imagefilter($this->im,img_filter_negate);//反色
   $ok=true;
   break;
   case 2:
   imagefilter($this->im,img_filter_grayscale); //黑白
   $ok=true;
   break;
   case 3:
   imagefilter($this->im,img_filter_emboss);//浮雕
   $ok=true;
   break;
   case 4:
   imagefilter($this->im,img_filter_gaussian_blur); //高斯模糊
   $ok=true;
   break;
   case 5:
   imagefilter($this->im,img_filter_brightness,50); //亮度50
   $ok=true;
   break;
   case 6:
   imagefilter($this->im,img_filter_contrast,-50); //对比度-50
   $ok=true;
   break;  
  }
  if($ok){  
   $this->imagesave($this->im,$savename,$this->info[2]);  //写文件
   imagedestroy($this->im);
   return 1;
  }else{
   imagedestroy($this->im);
   return 0;}
 }
 

class cd_barra
{
    var $file;
    var $into;
   
    var $cd_barras = array(0=>"00110",1=>"10001",2=>"01001",3=>"11000",4=>"00101",
                           5=>"10100",6=>"01100",7=>"00011",8=>"10010",9=>"01010"
                           );
    function cd_barra($value,$files,$into=1) {
      $lower = 1 ; $hight = 55;         
      $this->into = $into;
      for($count1=9;$count1>=0;$count1--){
        for($count2=9;$count2>=0;$count2--){  
          $count = ($count1 * 10) + $count2 ;
          $text = "" ;
          for($i=1;$i<6;$i++){
            $text .=  substr($this->cd_barras[$count1],($i-1),1) . substr($this->cd_barras[$count2],($i-1),1);
          }
          $this->cd_barras[$count] = $text;
       }
      }
   
          //$img         = imagecreate($lower*95+300,$hight+30);
          $img         = imagecreate(145,55);
   
    //$img         = imagecreate(395,73);  
          $cl_black = imagecolorallocate($img, 0, 0, 0);
          $cl_white = imagecolorallocate($img, 255, 255, 255);
   
              
          
          imagefilledrectangle($img, 0, 0, $lower*95+1000, $hight+30, $cl_white);
          
   
          imagefilledrectangle($img, 1,1,1,53,$cl_black);
          imagefilledrectangle($img, 2,1,2,53,$cl_white);
          imagefilledrectangle($img, 3,1,3,53,$cl_black);
          imagefilledrectangle($img, 4,1,4,53,$cl_white);
   
   
   
    $thin = 1 ;
    if(substr_count(strtoupper($_server['server_software']),"win32")){
        //o tamanho para windows tem que ser 3
        // for windows, the wide bar has = 3
         $wide = 3;
    } else {
            $wide = 2.72;
       }
    $pos   = 5 ;
    $text = $value ;
    if((strlen($text) % 2) <> 0){
        $text = "0" . $text;
    }
   
   
    while (strlen($text) > 0) {
      $i = round($this->barra_left($text,2));
      $text = $this->barra_right($text,strlen($text)-2);
      
      $f = $this->cd_barras[$i];
      
      for($i=1;$i<11;$i+=2){
        if (substr($f,($i-1),1) == "0") {
          $f1 = $thin ;
        }else{
          $f1 = $wide ;
        }
   
      
      imagefilledrectangle($img, $pos,1,$pos-1+$f1,53,$cl_black)  ;
      $pos = $pos + $f1 ;  
      
      if (substr($f,$i,1) == "0") {
          $f2 = $thin ;
        }else{
          $f2 = $wide ;
        }
   
      imagefilledrectangle($img, $pos,1,$pos-1+$f2,53,$cl_white)  ;
      $pos = $pos + $f2 ;  
      }
    }
   
       
    imagefilledrectangle($img, $pos,1,$pos-1+$wide,53,$cl_black);
    $pos=$pos+$wide;
   
    imagefilledrectangle($img, $pos,1,$pos-1+$thin,53,$cl_white);
    $pos=$pos+$thin;
   
   
    imagefilledrectangle($img, $pos,1,$pos-1+$thin,53,$cl_black);
    $pos=$pos+$thin;
   
    $this->put_img($img,$files);
    }
   
    function barra_left($input,$comp){
        return substr($input,0,$comp);
    }
   
    function barra_right($input,$comp){
        return substr($input,strlen($input)-$comp,$comp);
    }
   
    function put_img($image,$file){
        if($this->into){           
   imagegif($image,$file);
        }
  else {
                    header("content-type: image/gif");
                    imagegif($image);
             }
        imagedestroy($image);
    }
}

?>

<?php
  include("codes.php");
 $new_code = new cd_barra("1234567890","a.gif",1);
 
 ?>
   <img src="a.gif"   />