<?

foreach (array('_GET', '_POST', '_COOKIE', '_SERVER') as $_SG) {
    foreach ($$_SG as $_SGK => $_SGV) {
        $$_SGK = $_SGV;
    }
}

//$image_jpg = StrToLower($kod) . ".jpg";
//$filename_jpg = "../img/obsah/".$image_jpg;
//$image_gif = StrToLower($kod) . ".gif";
//$filename_gif = "../img/obsah/".$image_gif;

//if (File_Exists($filename_jpg)): 
//$img = $filename_jpg ;
//elseif (File_Exists($filename_gif)): 
//$img = $filename_gif; 
//else:
//return false;
//endif;

//$filename = "../img/".$file;
$filename = $file;
if (File_Exists($filename)):
$img = $filename;
else:
return false;
endif;


Header("Content-Type: Image/jpeg");


$src_img = ImageCreatefromJPEG($img) or 
$src_img = ImageCreatefromGIF($img) or
end; 

$quality = 100; //quality of the .jpg

$src_width = imagesx($src_img); // width original image
$src_height = imagesy($src_img); // height original image

$dest_width = $w; //width thumbnail (image will scale down completely to this width)
$dest_height = $h; //max height of the thumbnail

$ar = $dest_width / $dest_height; // aspect ratio

$divX = $src_width / $dest_width; // factor to calculate the scaled down height

if($src_height / $divX <= $dest_height){ //if the scaled down height is smaller than the thumbnail max height
$y = 0; // don`t center crop (there is nothing to center)
$dest_height = $src_height / $divX; // keep the original scaled down height
$cropheight = $src_height; // set the cropheight to the original image height (there is nothing to be cropped)
}else{
$cropheight = $src_width / $ar; //maintain the proper thumbnail aspect ratio
$y = $src_height / $divX; //calculate the scaled down height
$y = ($y - $dest_height) * $divX / 2; //substract the thumbnail height from the scaled down original height than divide by 2 (for centering the crop to the proper height)
}

$dest_img = imagecreatetruecolor($dest_width,$dest_height); 
imagecopyresampled($dest_img, $src_img, 0, 0, 0 ,$y, $dest_width, $dest_height, $src_width, $cropheight); 
imagejpeg($dest_img, '', $quality); 
imagedestroy($src_img); 
imagedestroy($dest_img); 
?>