Resize billede ved upload, gem i DB?

Brug imagemagick.

$cmd = "convert original_billede.jpg -resize 200x nyt_billede.jpg";
exec($cmd);

Så kan du hente de binære data fra nyt_billede.jpg bagefter, lægge det i databasen og slette billederne...

Ovenstående eksempel giver billedet en bredde på 200px uanset højden.

Se flere eksempler på http://www.imagemagick.org/Usage/resize/

Kig på nogle af mine artikler.
Der er kode til resize.

Har selv fundet en komplet løsning :

Nedenstående funktion laver hele arbejdet...
function scaleImageFileToBlob($file,$width,$height) {

    $source_pic = $file;
    $max_width = $width;
    $max_height = $height;

    list($width, $height, $image_type) = getimagesize($file);

    switch ($image_type)
    {
        case 1: $src = imagecreatefromgif($file); break;
        case 2: $src = imagecreatefromjpeg($file);  break;
        case 3: $src = imagecreatefrompng($file); break;
        default: return '';  break;
    }

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

    if( ($width <= $max_width) && ($height <= $max_height) ){
        $tn_width = $width;
        $tn_height = $height;
        }elseif (($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;
    }

    $tmp = imagecreatetruecolor($tn_width,$tn_height);

    /* Check if this image is PNG or GIF, then set if Transparent*/
    if(($image_type == 1) OR ($image_type==3))
    {
        imagealphablending($tmp, false);
        imagesavealpha($tmp,true);
        $transparent = imagecolorallocatealpha($tmp, 255, 255, 255, 127);
        imagefilledrectangle($tmp, 0, 0, $tn_width, $tn_height, $transparent);
    }
    imagecopyresampled($tmp,$src,0,0,0,0,$tn_width, $tn_height,$width,$height);

    /*
    * imageXXX() only has two options, save as a file, or send to the browser.
    * It does not provide you the oppurtunity to manipulate the final GIF/JPG/PNG file stream
    * So I start the output buffering, use imageXXX() to output the data stream to the browser,
    * get the contents of the stream, and use clean to silently discard the buffered contents.
    */
    ob_start();

    switch ($image_type)
    {
        case 1: imagegif($tmp); break;
        case 2: imagejpeg($tmp, NULL, 70);  break; // best quality
        case 3: imagepng($tmp, NULL, 0); break; // no compression
        default: echo ''; break;
    }

    $final_image = ob_get_contents();

    ob_end_clean();

    return $final_image;
}

Kaldes således :
$image = scaleImageFileToBlob($_FILES['binFile']['tmp_name'],500,500);

$image smides så ind i blobfeltet i databasen...