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I ate three cookies 🍪 (v3.40.2) edition

Rule declare_strict_types

Force strict types declaration in all files. Requires PHP >= 7.0.

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:

Source class

PhpCsFixer\Fixer\Strict\DeclareStrictTypesFixer