PHPStan Array Merge Rules

This package provides PHPStan rules to satisfy code quality standards for WPForms plugins.

Installation

You can install the package via composer:

composer require --dev kkarpieszuk/phpstan-wpforms-rules

You cna also install it directly from GitHub:

composer require --dev kkarpieszuk/phpstan-wpforms-rules:main

Usage

The rules will be automatically registered if you include the package in your PHPStan configuration:

includes:
    - vendor/kkarpieszuk/phpstan-wpforms-rules/rules.neon

Rules

DisallowArrayMergeInLoopsRule

This rule prevents the use of array_merge inside foreach and for loops. Using array_merge in loops can lead to performance issues due to repeated array copying.

Example of code that will trigger an error:

$result = [];
foreach ($arrays as $array) {
    $result = array_merge($result, $array); // ERROR: Do not use array_merge inside foreach or for loops.
}

Alternative solution:

$result = array_merge(...$arrays);

License

The MIT License (MIT).