what to do after you install express to create an api code example

Example 1: How do I make a redirect in PHP?

header("Location: http://example.com/redirect_page.php");
die(); //Force the script to quit, or you would raise an error...

Example 2: How to use my constants in Larvel

Create a file constants.php inside app/config/ and put your settings in an array:

<?php
//file : app/config/constants.php

return [
	'ADMIN_NAME' => 'administrator'
];

Then anywhere in your controllers or views you can get the value by using Config Facade:

echo Config::get('constants.ADMIN_NAME');