PHP namespaces and “use”

by

The use operator is for giving aliases to names of classes, interfaces or other namespaces. Most use statements refer to a namespace or class that you’d like to shorten:

use My\Full\Namespace;

is equivalent to:

use My\Full\Namespace as Namespace;
// Namespace\Foo is now shorthand for My\Full\Namespace\Foo

If the use operator is used with a class or interface name, it has the following uses:

// after this, "new DifferentName();" would instantiate a My\Full\Classname
use My\Full\Classname as DifferentName;

// global class - making "new ArrayObject()" and "new \ArrayObject()" equivalent
use ArrayObject;

The use operator is not to be confused with autoloading. A class is autoloaded (negating the need for include) by registering an autoloader (e.g. with spl_autoload_register). You might want to read PSR-4 to see a suitable autoloader implementation.

More Related Contents:

  1. What does a \ (backslash) do in PHP (5.3+)?
  2. Parse XML with Namespace using SimpleXML [duplicate]
  3. What are namespaces?
  4. PHP library for parsing XML with a colons in tag names? [duplicate]
  5. parse an XML with SimpleXML which has multiple namespaces [duplicate]
  6. PHP namespace simplexml problems
  7. Can PHP namespaces contain variables?
  8. How to use objects from other namespaces and how to import namespaces in PHP
  9. Unexpected character in input: ‘\’ (ASCII=92) state=1
  10. Autoloading classes in PHPUnit using Composer and autoload.php
  11. PHP how to import all classes from another namespace
  12. Namespace in PHP CodeIgniter Framework
  13. Using namespaces with classes created from a variable
  14. How to get all class names inside a particular namespace?
  15. PHP namespace with Dynamic class name
  16. How to use “root” namespace of php?
  17. SimpleXML: Working with XML containing namespaces
  18. How to use composer packages in codeigniter?
  19. Use php namespace inside function
  20. PHP adding custom namespace using autoloader from composer
  21. SimpleXML SOAP response Namespace issues
  22. How to get attribute of node with namespace using SimpleXML? [closed]
  23. Troubleshooting “The use statement with non-compound name … has no effect”
  24. Class ‘App\Http\Controllers\DB’ not found and I also cannot use a new Model
  25. Using namespaces in Laravel 4
  26. PHP namespace PDO not found
  27. Facebook SDK v4 for PHP Minimal Example
  28. unexpected ‘use’ (T_USE) when trying to use composer
  29. Can PHP PDO Statements accept the table or column name as parameter?
  30. Saving images in database mysql

Leave a Comment