PHP How to use variable from one if statement in another?

I have a little problem.

I'm making form that submits simple article to database and then displays it on admin.php page.

Everything works fine, except image. First i upload it to my server and then I try to add string(path of this image) to database.

However I can't use variable $filepath in second if statement. I can echo it after image upload but can't use in other if.

Could u help me? Thanks in advance.

Here's code:

<?php session_start();
  if (!isset($_SESSION['logged-in']))
  {
    header('Location: index.php');
    exit();
  }
?>
<?php
include('db_connect.php');
if(isset($_POST['btn_upload'])) {
  $filetmp = $_FILES["file_img"]["tmp_name"];
  $filename = $_FILES["file_img"]["name"];
  $filetype = $_FILES["file_img"]["type"];
  $filepath = "photo/".$filename;

  move_uploaded_file($filetmp,$filepath);

  $result = mysqli_query($mysqli, "INSERT INTO upload_img (img_name,img_path,img_type) VALUES ('$filename','$filepath','$filetype')");

  echo '<img src="' . $filepath . '" alt="">';
  echo $filepath;
}

if ( isset($_POST['add']) ) {
  $title = strip_tags($_POST['title']);
  $content = strip_tags($_POST['content']);
  $image = strip_tags($filepath);
  $statement = $mysqli->prepare("INSERT bikes (title,image,content) VALUES (?,?,?)");
  $statement->bind_param("sss",$title,$image,$content);
  $statement->execute();
  $statement->close();
  header('Location: admin.php');
}
?>


<form method="post" action="" class="ui form">
  <div class="required field">
    <label>Title</label>
    <input type="text" name="title" id="title">
  </div>
  <div class="required field">
    <label>Content</label>
    <textarea name="content" id="content" cols="30" rows="10"></textarea>
  </div>
  <div class="required field">
    <label>Image</label>
    <input type="text" name="image" id="image">
  </div>
    <input type="submit" class="ui primary button" id="add" name="add" value="Add article"></input>
</form> 

<form action="addbike.php" method="post" enctype="multipart/form-data">
  <input type="file" name="file_img" />
  <input type="submit" name="btn_upload" value="Upload">  
</form>