View file down/prew.php

<?

if (!isset($_GET['img']))
{
exit;
}

$max_width = $_GET['w']; 
$max_height = $_GET['h']; 

$image=base64_decode($_GET['img']);
$act=$_GET['act'];
if($act=="jpg"){
$size = GetImageSize($image); 
$width = $size[0]; 
$height = $size[1]; 

$x_ratio = $max_width / $width; 
$y_ratio = $max_height / $height; 

if ( ($width <= $max_width) && ($height <= $max_height) ) { 
  $tn_width = $width; 
  $tn_height = $height; 
} 
else if (($x_ratio * $height) < $max_height) { 
  $tn_height = ceil($x_ratio * $height); 
  $tn_width = $max_width; 
} 
else { 
  $tn_width = ceil($y_ratio * $width); 
  $tn_height = $max_height; 
} 

$src = ImageCreateFromJpeg($image); 
$dst = ImageCreateTrueColor($tn_width,$tn_height); 
ImageCopyResized($dst, $src, 0, 0, 0, 0, 
    $tn_width,$tn_height,$width,$height); 
header("Content-type: image/jpeg"); 
ImageJpeg ($dst, null, 75); 
ImageDestroy($src); 
ImageDestroy($dst); }	  
  	  
  	  
if($act=="gif"){
$size = GetImageSize($image); 
$width = $size[0]; 
$height = $size[1]; 

$x_ratio = $max_width / $width; 
$y_ratio = $max_height / $height; 

if ( ($width <= $max_width) && ($height <= $max_height) ) { 
  $tn_width = $width; 
  $tn_height = $height; 
} 
else if (($x_ratio * $height) < $max_height) { 
  $tn_height = ceil($x_ratio * $height); 
  $tn_width = $max_width; 
} 
else { 
  $tn_width = ceil($y_ratio * $width); 
  $tn_height = $max_height; 
} 

$src = ImageCreateFromGif($image); 
$dst = ImageCreateTrueColor($tn_width,$tn_height); 
ImageCopyResized($dst, $src, 0, 0, 0, 0, 
    $tn_width,$tn_height,$width,$height); 
header("Content-type: image/gif"); 
ImageGif ($dst); 
ImageDestroy($src); 
ImageDestroy($dst); }	  	  
  	  
 if($act=="png"){
$size = GetImageSize($image); 
$width = $size[0]; 
$height = $size[1]; 

$x_ratio = $max_width / $width; 
$y_ratio = $max_height / $height; 

if ( ($width <= $max_width) && ($height <= $max_height) ) { 
  $tn_width = $width; 
  $tn_height = $height; 
} 
else if (($x_ratio * $height) < $max_height) { 
  $tn_height = ceil($x_ratio * $height); 
  $tn_width = $max_width; 
} 
else { 
  $tn_width = ceil($y_ratio * $width); 
  $tn_height = $max_height; 
} 

$src = ImageCreateFromPng($image); 
$dst = ImageCreateTrueColor($tn_width,$tn_height); 
ImageCopyResized($dst, $src, 0, 0, 0, 0, 
    $tn_width,$tn_height,$width,$height); 
header("Content-type: image/png"); 
ImagePng ($dst); 
ImageDestroy($src); 
ImageDestroy($dst); }




?>