使用php或Jquery / Javascript隐藏/显示表单

Question

I have a problem here which I have solved with two different solutions. I would like to know:

• Which solution is the most secure?
• Which solution is more efficient, basically which one requires the least bandwith for user?
• Which solution in the long run is easiest to maintain?
• Is there a possibility that any of the solutions might get outdated in the near future? Example if they change how jQuery .hide() works or anything else, whatever.

Here are my solutions:

Solution 1 with jQuery and some php.

jQuery Code:

$(document).ready(function(){

  $.get( "hide_forms_until_logged_in.php", function(  data ) {
    console.log(data.response);
    if(data.response == "false") {
      $("form").hide();
    } else {
      $("form").show();
    }
  }, "json");
});

HTML markup:

<form action="" method="POST" enctype="multipart/form-data">
  <input type="file" name="file" /> <br/>
  <input type="submit" name="submit" value="Upload"/>
</form>

hide_forms_until_logged_in.php:

include 'session.php';
if (isset($_SESSION['login_user'])) {
  echo json_encode(array("response"=>"true"));
} else {
  echo json_encode(array("response"=>"false"));
}

Solution 2 with mostly php:

hide_forms_until_logged_in.php:

include 'session.php';
if (isset($_SESSION['login_user'])) {
  echo "<form action='' method='POST'
  enctype='multipart/form-data'>
   <input type='file' name='file' /> <br/>
   <input type='submit' name='submit' value='Ladda upp'/>
  </form>";
} else {
  echo "Logga in for att ladda upp filer";
}

And inside the page:

  <?php include "hide_forms_until_logged_in.php" ?>

I know I could have made a function and call it inside the include there, for the sake just put the include there.

The form itself before posting anything to database has a check if the user is logged in or not.