string_length_to_empty.rst

Rule string_length_to_empty

String tests for empty must be done against '', not with strlen.

Warning

Using this rule is risky

Risky when strlen is overridden, when called using a stringable object, also no longer triggers warning when called using non-string(able).

Examples

Example #1

--- Original
+++ New
-<?php $a = 0 === strlen($b) || \STRLEN($c) < 1;
+<?php $a = '' === $b || $c === '';

Rule sets

The rule is part of the following rule sets:

• @PhpCsFixer:risky
• @Symfony:risky

References

• Fixer class: PhpCsFixer\Fixer\StringNotation\StringLengthToEmptyFixer
• Test class: PhpCsFixer\Tests\Fixer\StringNotation\StringLengthToEmptyFixerTest

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