Php image resize script

if(isset($_FILES['files']) && !empty($_FILES['files'])){

    $fileName = $_FILES['files']['name'];
    $fileTemp = $_FILES['files']['tmp_name'];
    $fileType = $_FILES['files']['type'];
    $allowedext = array('image/png', 'image/gif', 'image/jpeg', 'image/jpg');
    $destination = "img/";
     $width = 400;
     $height = 350;



    for ($i = 0; $i< count($_FILES['files']['name']); $i++){

        if(in_array($fileType[$i], $allowedext)){


            list($orignal_width, $original_height) = getimagesize($fileTemp[$i]);

             $scale_ratio = $orignal_width/$original_height;

            if(($width/$height)>$scale_ratio){

                 $width = $height*$scale_ratio;
            }else{
                 $height = $width/$scale_ratio;
            }

            $img = null;


            switch ($fileType[$i]){
                case "image/jpg":

                    $img = imagecreatefromjpeg($fileTemp[$i]);

                    break;
                case  "image/png":

                    $img = imagecreatefrompng($fileTemp[$i]);

                    break;
                case "image/gif":

                    $img = imagecreatefromgif($fileTemp[$i]);

                    break;
                case "image/jpeg":

                    $img = imagecreatefromjpeg($fileTemp[$i]);

            }

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

            imagecopyresampled($canvas, $img, 0, 0, 0, 0, $width, $height, $orignal_width, $original_height);

            imagejpeg($canvas, $destination.$fileName[$i], 80);
        }else{
            echo "Not in array";
        }
    }

}else{
    die("Error occurred");
}