resize the uploaded picture with php - php

Question

I am trying to create a plattform where users upload a image on my site. The image is first resized before being moved to a specific folder on the server. The thing is that everything is working except one thing. When the resize procedure is done it cuts out a portion of the image, not actually resizing the image. I am trying to find out what the problem is but I'm only a novice on php. Do you guys have any suggestions to what the problem might be?
$target_dir = "uploads/";
$target_file = $target_dir . basename($_FILES["image"]["name"]);
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
$file = $_FILES["image"]["tmp_name"];
function resize_image($file, $width, $height) {
list($w, $h) = getimagesize($file);
/* calculate new image size with ratio */
$ratio = max($width/$w, $height/$h);
$h = ceil($height / $ratio);
$x = ($w - $width / $ratio) / 2;
$w = ceil($width / $ratio);
/* read binary data from image file */
$imgString = file_get_contents($file);
/* create image from string */
$image = imagecreatefromstring($imgString);
$tmp = imagecreatetruecolor($width, $height);
imagecopyresampled($tmp, $image,
0, 0,
$x, 0,
$width, $height,
$w, $h);
imagejpeg($tmp, $file, 100);
return $file;
/* cleanup memory */
imagedestroy($image);
imagedestroy($tmp);
}
$check = getimagesize($_FILES["image"]["tmp_name"]);
if($check == false) {
echo "Filen är ingen bild! <a href=addPost>Tillbaka</a>";
exit;
}
if ($_FILES["image"]["size"] > 500000) {
echo "Din bild är för stor! <a href=addPost>Tillbaka</a>";
exit;
}
if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "gif" ) {
echo "Endast jpg, png, jpeg samt gif bilder är tillåtna! <a href=addPost>Tillbaka</a>";
exit;
}
else {
$temp = explode(".", $_FILES["image"]["name"]);
$newfilename = round(microtime(true)) . '.' . end($temp);
move_uploaded_file(resize_image($_FILES["image"]["tmp_name"], 200, 200), "uploads/" . $newfilename);
chmod(UPLOAD_DIR . $newfilename, 0644);
}