Laravel Join 3 Tables: Joining more than two tables is very common in any framework, we often need to join 3 or more then three table in Laravel. Here in this tutorial we are going to explain how you can join three tables or more than three tables in Laravel.

Laravel Join 3 Tables Example | Join Multiple Tables

It is very simple to join 3 tables in Laravel. Let us create an example to join 3 table –

$orderList = DB::table('users')
    ->join('orders', 'users.id', '=', 'orders.user_id')
    ->join('order_items', 'orders.id', '=', 'order_items.orders_id')
    ->where('users.id', '=', 5)
    ->get();

The above example will join the three tables – users, orders and order_items on the basis of the foreign keys. You can join multiple tables on the same ways to get the data from different-different tables.

Laravel Check Duplicate Records: We often need to check duplicate records when working with database table records. It is very simple to check the duplicate records in Laravel. Here in this tutorial we are going to explain how you can Check duplicate Records in Laravel.

Laravel Check Duplicate Records Example | Laravel check if user exists

Here we have checked that the given email exists in the database table or not. You can simply check the duplicate records in Laravel simply as below-

first();
if ($userExists === null) {
   // User Not Found Your Stuffs Goes Here..
}
?>

The above example will check the given email exists in the database table or not it does not exists then it will return null, Using this response you do other stuffs.

Laravel get Session ID : Laravel session ID depends upon the version of the Laravel, Here in this tutorial we are going to explain how you can get Session ID in Laravel. We are going to explain how to get Session Id in Different versions of Laravel.

Laravel get Session ID Example

You can get the session Id in different versions of laravel as –

Laravel 3

You can get the Session ID in Laravel 3 simply as below –

$sessionID = $_COOKIE['laravel_session'];

Laravel 4.0

You can get the Session ID in Laravel 4.0 simply as below –

$sessionID = session_id();

Laravel 4.1 & Onwards | Laravel 5

You can get the Session ID in Laravel 4.1 and onwards version simply as below –

$sessionID = Session::getId();

Set Headers in Laravel: There are many ways you can set headers in Laravel. You can set header directly in view or you can use before filter to bind headers in All views. Here in this tutorial we are going to explain how you can set headers in Laravel.

How to Set Headers in Laravel Example

You can add the headers in your view file directly, here in an example of setting headers in view file –

// Outputting a PDF
header('Content-Type: application/pdf');

// It will be called my_download.pdf
header('Content-Disposition: attachment; filename="my_download.pdf"');

// The PDF source is in original.pdf
readfile('my_download.pdf');

You can set other headers on the same way in Laravel.