doc/rules/language_construct/class_keyword.rst
class_keywordConverts FQCN strings to *::class keywords.
This rule does not have an understanding of whether a class exists in the scope of the codebase or not, relying on run-time and autoloaded classes to determine it, which makes the rule useless when running on a single file out of codebase context.
This rule is EXPERIMENTAL
Rule is not covered with backward compatibility promise and may produce unstable
or unexpected results, use it at your own risk. Rule's behaviour may be changed
at any point, including rule's name; its options' names, availability and
allowed values; its default configuration. Rule may be even removed without
prior notice. Feel free to provide feedback and help with determining final
state of the rule.
This rule is RISKY
~~~~~~~~~~~~~~~~~~
Do not use it, unless you know what you are doing.
Examples
--------
Example #1
~~~~~~~~~~
.. code-block:: diff
--- Original
+++ New
<?php
-$foo = 'PhpCsFixer\Tokenizer\Tokens';
-$bar = "\PhpCsFixer\Tokenizer\Tokens";
+$foo = \PhpCsFixer\Tokenizer\Tokens::class;
+$bar = \PhpCsFixer\Tokenizer\Tokens::class;
References
----------
- Fixer class: `PhpCsFixer\\Fixer\\LanguageConstruct\\ClassKeywordFixer <./../../../src/Fixer/LanguageConstruct/ClassKeywordFixer.php>`_
- Test class: `PhpCsFixer\\Tests\\Fixer\\LanguageConstruct\\ClassKeywordFixerTest <./../../../tests/Fixer/LanguageConstruct/ClassKeywordFixerTest.php>`_
The test class defines officially supported behaviour. Each test case is a part of our backward compatibility promise.