缩略图生成的php程序

客户端上载的页面： 

-------------------- upload.htm --------------------- 

method="post" action="upload.php"> 

请选择或输入上传文件名: 

 

--------------------- upload.php ------------------- 

if(empty($upfile)){

print("No file was transfered!\n无文件上传!");

exit;

}

$image_path=$upfile;

@$image_info=getimagesize($image_path);

if($image_info[2]==2)

{@$image2=imagecreatefromjpeg($image_path);

}

else if($image_info[2]==1){

@$image2=imagecreatefromgif($image_path);

}

else

if(empty($image2))

$image2_x=imagesx($image2);

$image2_y=imagesy($image2);

if($image2_x==$image2_y){

$x=150;

$y=0;

}

else if($image2_x>$image2_y){ 

$x=150; 

$y=intval(150*$image2_y/$image2_x); 

} 

else{ 

$y=150; 

$x=intval(150*$image2_x/$image2_y); 

} 

$image1=imagecreate($x,$y); 

imagecopyresized($image1,$image2,0,0,0,0,$x,$y,$image2_x,$image2_y); 

imagegif($image1,"new.gif"); 

?>