actually, I want that, when I upload 1 image then original image will be store in `upload/og/`. But I also want that image in different sizes, like `1366x768` , `1280*600` , `768x1024` etc... not these dimensions only, it will proportional ratio of that Image. 

I have one code, which convert that image to thumb with ratio, this works `max-width=300` and `max-height=600`.

```
define ("MAX_SIZE","100");
define ("WIDTH","300");
define ("HEIGHT","600");
function make_thumb($img_name,$filename,$new_w,$new_h)
{
    $ext=getExtension($img_name);
    if(!strcmp("jpg",$ext) || !strcmp("jpeg",$ext))
        $src_img=imagecreatefromjpeg($img_name);
    if(!strcmp("png",$ext))
        $src_img=imagecreatefrompng($img_name);

    //gets the dimmensions of the image
    $old_x=imageSX($src_img);
    $old_y=imageSY($src_img);

    // next we will calculate the new dimmensions for the thumbnail image
    $ratio1=$old_x/$new_w;
    $ratio2=$old_y/$new_h;
    if($ratio1>$ratio2) {
        $thumb_w=$new_w;
        $thumb_h=$old_y/$ratio1;
    }
    else {
        $thumb_h=$new_h;
        $thumb_w=$old_x/$ratio2;
    }
    $dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);
    imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y); // resize the big image to the new created one

    if(!strcmp("png",$ext)) // output the created image to the file. Now we will have the thumbnail into the file named by $filename
        imagepng($dst_img,$filename);
    else
        imagejpeg($dst_img,$filename);

    imagedestroy($dst_img);
    imagedestroy($src_img);
}
function getExtension($str) {
    $i = strrpos($str,".");
    if (!$i) { return ""; }
    $l = strlen($str) - $i;
    $ext = substr($str,$i+1,$l);
    return $ext;
}

$errors=0;
if(isset($_POST['submit']))
    {
    //reads the name of the file the user submitted for uploading
    $image=$_FILES['scrnsots']['name'];
    if ($image)
    {
        $filename = stripslashes($_FILES['scrnsots']['name']);
        // get the extension of the file in a lower case format
        $extension = getExtension($filename);
        $extension = strtolower($extension);
        // if it is not a known extension, we will suppose it is an error, print an error message
        //and will not upload the file, otherwise we continue
        if (($extension != "jpg") && ($extension != "jpeg") && ($extension != "png"))
        {
            echo '<h1>Unknown extension!</h1>';
            $errors=1;
        }
        else
        {
            $size=getimagesize($_FILES['scrnsots']['tmp_name']);
            $sizekb=filesize($_FILES['scrnsots']['tmp_name']);
            if ($sizekb > MAX_SIZE*102400)
            {
                echo '<h1>You have exceeded the size limit!</h1>';
                $errors=1;
            }
            $image_name= $image .''. time() .'.'.$extension;
            $newname="uploads/scrnsots/".$image_name;
            $copied = copy($_FILES['scrnsots']['tmp_name'], $newname);
            if (!$copied)
            {
                echo '<h1>Copy unsuccessfull!</h1>';
                $errors=1;
            }
            else
            {
                $thumb_name='uploads/scrnsots/thumb/thumb-'.$image_name;
                $thumb=make_thumb($newname,$thumb_name,WIDTH,HEIGHT);
            }
        }
    }
}
if(isset($_POST['submit']) && !$errors)
{
    echo $thumb_name ."<br/>";

        echo "<div class='custom alert alert-success'>Successfully Added.<a href='#' class='close' data-dismiss='alert' aria-label='close'>&times;</a></div>";
}

```

but it will only create thumb. i want 1 image in different - dimentions(height - width).