Problem med beskärning vid uppladdning

Låter som mycket och skriva ärligt talat. men skapa filen
resize_thumb.php
-----------------
<?php
##############################################
# Shiege Iseng Resize Class
# 11 March 2003
# shiegege_at_yahoo.com
# View Demo :
# http://shiege.com/scripts/thumbnail/
/*############################################
include 'utf8/utf8.php';

Sample :
$thumb=new thumbnail("./shiegege.jpg"); // generate image_file, set filename to resize
$thumb->size_width(100); // set width for thumbnail, or
$thumb->size_height(300); // set height for thumbnail, or
$thumb->size_auto(200); // set the biggest width or height for thumbnail
$thumb->jpeg_quality(75); // [OPTIONAL] set quality for jpeg only (0 - 100) (worst - best), default = 75
$thumb->show(); // show your thumbnail
$thumb->save("./huhu.jpg"); // save your thumbnail to file
----------------------------------------------
Note :
- GD must Enabled
- Autodetect file extension (.jpg/jpeg, .png, .gif, .wbmp)
but some server can't generate .gif / .wbmp file types
- If your GD not support 'ImageCreateTrueColor' function,
change one line from 'ImageCreateTrueColor' to 'ImageCreate'
(the position in 'show' and 'save' function)
*/############################################

class thumbnail
{
var $img;

function thumbnail($imgfile)
{
    //detect image format
    $this-\>img\["format"\]=ereg_replace(".\*\\.(.\*)$","\\\\1",$imgfile);
    $this-\>img\["format"\]=strtoupper($this-\>img\["format"\]);
    if ($this-\>img\["format"\]=="JPG" \|\| $this-\>img\["format"\]=="JPEG") {
        //JPEG
        $this-\>img\["format"\]="JPEG";
        $this-\>img\["src"\] = ImageCreateFromJPEG ($imgfile);
    } elseif ($this-\>img\["format"\]=="PNG") {
        //PNG
        $this-\>img\["format"\]="PNG";
        $this-\>img\["src"\] = ImageCreateFromPNG ($imgfile);
    } elseif ($this-\>img\["format"\]=="GIF") {
        //GIF
        $this-\>img\["format"\]="GIF";
        $this-\>img\["src"\] = ImageCreateFromGIF ($imgfile);
    } elseif ($this-\>img\["format"\]=="WBMP") {
        //WBMP
        $this-\>img\["format"\]="WBMP";
        $this-\>img\["src"\] = ImageCreateFromWBMP ($imgfile);
    } else {
        //DEFAULT
        echo "Not Supported File";
        exit();
    }
    @$this-\>img\["lebar"\] = imagesx($this-\>img\["src"\]);
    @$this-\>img\["tinggi"\] = imagesy($this-\>img\["src"\]);
    //default quality jpeg
    $this-\>img\["quality"\]=75;
}

function size_height($size=100)
{
    //height
    $this-\>img\["tinggi_thumb"\]=$size;
    @$this-\>img\["lebar_thumb"\] = ($this-\>img\["tinggi_thumb"\]/$this-\>img\["tinggi"\])\*$this-\>img\["lebar"\];
}

function size_width($size=100)
{
    //width
    $this-\>img\["lebar_thumb"\]=$size;
    @$this-\>img\["tinggi_thumb"\] = ($this-\>img\["lebar_thumb"\]/$this-\>img\["lebar"\])\*$this-\>img\["tinggi"\];
}

function size_auto($size=100)
{
    //size
    if ($this-\>img\["lebar"\]\>=$this-\>img\["tinggi"\]) {
        $this-\>img\["lebar_thumb"\]=$size;
        @$this-\>img\["tinggi_thumb"\] = ($this-\>img\["lebar_thumb"\]/$this-\>img\["lebar"\])\*$this-\>img\["tinggi"\];
    } else {
        $this-\>img\["tinggi_thumb"\]=$size;
        @$this-\>img\["lebar_thumb"\] = ($this-\>img\["tinggi_thumb"\]/$this-\>img\["tinggi"\])\*$this-\>img\["lebar"\];
    }
}

function jpeg_quality($quality=75)
{
    //jpeg quality
    $this-\>img\["quality"\]=$quality;
}

function show()
{
    //show thumb
    @Header("Content-Type: image/".$this-\>img\["format"\]);

    /\* change ImageCreateTrueColor to ImageCreate if your GD not supported ImageCreateTrueColor function\*/
    $this-\>img\["des"\] = ImageCreateTrueColor($this-\>img\["lebar_thumb"\],$this-\>img\["tinggi_thumb"\]);
        @imagecopyresized ($this-\>img\["des"\], $this-\>img\["src"\], 0, 0, 0, 0, $this-\>img\["lebar_thumb"\], $this-\>img\["tinggi_thumb"\], $this-\>img\["lebar"\], $this-\>img\["tinggi"\]);

    if ($this-\>img\["format"\]=="JPG" \|\| $this-\>img\["format"\]=="JPEG") {
        //JPEG
        imageJPEG($this-\>img\["des"\],"",$this-\>img\["quality"\]);
    } elseif ($this-\>img\["format"\]=="PNG") {
        //PNG
        imagePNG($this-\>img\["des"\]);
    } elseif ($this-\>img\["format"\]=="GIF") {
        //GIF
        imageGIF($this-\>img\["des"\]);
    } elseif ($this-\>img\["format"\]=="WBMP") {
        //WBMP
        imageWBMP($this-\>img\["des"\]);
    }
}

function save($save="")
{
    //save thumb
    if (empty($save)) $save=utf8_strtolower("./thumb.".$this-\>img\["format"\]);
    /\* change ImageCreateTrueColor to ImageCreate if your GD not supported ImageCreateTrueColor function\*/
    $this-\>img\["des"\] = ImageCreateTrueColor($this-\>img\["lebar_thumb"\],$this-\>img\["tinggi_thumb"\]);
        @imagecopyresized ($this-\>img\["des"\], $this-\>img\["src"\], 0, 0, 0, 0, $this-\>img\["lebar_thumb"\], $this-\>img\["tinggi_thumb"\], $this-\>img\["lebar"\], $this-\>img\["tinggi"\]);

    if ($this-\>img\["format"\]=="JPG" \|\| $this-\>img\["format"\]=="JPEG") {
        //JPEG
        imageJPEG($this-\>img\["des"\],"$save",$this-\>img\["quality"\]);
    } elseif ($this-\>img\["format"\]=="PNG") {
        //PNG
        imagePNG($this-\>img\["des"\],"$save");
    } elseif ($this-\>img\["format"\]=="GIF") {
        //GIF
        imageGIF($this-\>img\["des"\],"$save");
    } elseif ($this-\>img\["format"\]=="WBMP") {
        //WBMP
        imageWBMP($this-\>img\["des"\],"$save");
    }
}

}
?>
----------------------
Sen när du ska resiza bilden :

----------------------
include_once("resize_thumb.php");
$thumb=new thumbnail("../images/members/presentations/$userid/$newfile"); //prepare to generate "shiegege.jpg" in directory "/www"
$thumb->size_width(75); // sätter bildens bredd till 75px
$thumb->jpeg_quality(80);
$thumb->save("images/"); // sparar bilden i mappen images

sen kan du få leka själv med att göra if satser o while satser för att få ut fyra olika mått genom att ändra size_width(75) till önskad bredd. den generar alltså automatiskt ut höjden för att bilden ska bli bra.
du kan även ändra size_width till size_height om du vill det