Namespaces overview

(PHP 5 >= 5.3.0, PHP 7)

Examples:

Namespace syntax example

PHP Namespaces provide a way in which to group related classes, interfaces, functions and constants. Here is an example of namespace syntax in PHP:

<?php
namespace my\name; // see "Defining Namespaces" section
 
class MyClass {}
function myfunction() {}
const MYCONST = 1;
 
$a = new MyClass;
$c = new \my\name\MyClass; // see "Global Space" section
 
$a = strlen('hi'); // see "Using namespaces: fallback to global
                   // function/constant" section
 
$d = namespace\MYCONST; // see "namespace operator and __NAMESPACE__
                        // constant" section
$d = __NAMESPACE__ . '\MYCONST';
echo constant($d); // see "Namespaces and dynamic language features" section
?>

Links:

http://php.net/manual/en/language.namespaces.rationale.php

doc_php

2025-01-10 15:47:30

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