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PHP Defining namespace
Introduction
Declaration of class, function and constants inside a namespace affects its acess, although any other PHP code can be present in it. PHP's namespace keyword is used to declare a new namespace. A file with .php extension must have namespace declaration in very first line after <?php tag, before any other code such as HTML script.
Example
<?php namespace myspace; class myclass{ // } function hello() { echo "Hello World
"; } ?>
If namespace declaration is not at the top of file, PHP parser throws fatal error
Example
<html> <body> Hello world <?php namespace myspace; function hello() { echo "Hello World
"; } use myspace; myspace\hello(); ?> </body> </html> ?>
Output
Above code now returns name following error
PHP Fatal error: Namespace declaration statement has to be the very first statement or after any declare call in the script
Only declare construct can appear before namespace declaration
Example
<?php declare (strict_types=1); namespace myspace; function hello() { echo "Hello World
"; } use myspace; myspace\hello(); ?>
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