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Rule declare_strict_types

Force strict types declaration in all files.

Warning

Using this rule is risky

Forcing strict types will stop non strict code from working.

Examples

Example #1

--- Original
+++ New
-<?php
+<?php declare(strict_types=1);
\ No newline at end of file

Rule sets

The rule is part of the following rule sets:

• @PHP70Migration:risky

• @PHP71Migration:risky

• @PHP74Migration:risky

• @PHP80Migration:risky

• @PHP82Migration:risky

References

• Fixer class: PhpCsFixer\Fixer\Strict\DeclareStrictTypesFixer

• Test class: PhpCsFixer\Tests\Fixer\Strict\DeclareStrictTypesFixerTest

The test class defines officially supported behaviour. Each test case is a part of our backward compatibility promise.