Define namespace for a file
<?php
namespace MyNamespaceName;This files namespace
define(__NAMESPACE__ . "\MY_DEFINE_NAME_VALUE", 1234);Calling a function in a namespace / a different namespace
$Number = \MyNamespaceName\MyFunctionName();Feel free to comment if you can add help to this page or point out issues and solutions you have found. I do not provide support on this site, if you need help with a problem head over to stack overflow.