function img_resize($src, $dest, $width, $height, $rgb=0xFFFFFF, $proportion=false, $quality=100) {

    if(!file_exists($src)) return false;

    $size = getimagesize($src);

    if($size === false) return false;  

    if($proportion === true) {

        $h0 = $height;

        $height = ($width/$size[0])*$size[1];

        if($height > $h0) { $height = $h0; $width = ($height/$size[1])*$size[0]; }}

        if(!$zoom){

                if($width > $size[0]) $width = $size[0];

            if($height > $size[1]) $height = $size[1];

        }

    $format = strtolower(substr($size['mime'], strpos($size['mime'], '/') + 1));

    $icfunc = 'imagecreatefrom'.$format;

    if(!function_exists($icfunc)) return false;

    $x_ratio = $width/$size[0];

    $y_ratio = $height/$size[1];

    $ratio = min($x_ratio, $y_ratio);

    $use_x_ratio = ($x_ratio == $ratio);

    if($use_x_ratio) { $new_width = $width; $new_left = 0; }

    else { $new_width = floor($size[0] * $ratio); $new_left = floor(($width - $new_width) / 2); }

    if(!$use_x_ratio) { $new_height = $height; $new_top = 0; }

    else { $new_height = floor($size[1] * $ratio); $new_top = floor(($height - $new_height) / 2); }

    $isrc = $icfunc($src);

    $idest = imagecreatetruecolor($width, $height);

    if(is_array($dest)) {

        $nd = explode('.', $src);

        $ndc = count($nd);

        $nd[$ndc - 2] .= $dest[0]; $dest = implode('.', $nd); }

    imagefill($idest, 0, 0, $rgb);

    imagecopyresampled($idest, $isrc, $new_left, $new_top, 0, 0, $new_width, $new_height, $size[0], $size[1]);

    imagejpeg($idest, $dest, $quality);

    imagedestroy($isrc);

    imagedestroy($idest);

    return $dest;

}