Deprecation Rules

This document details the rules available in the Deprecation category.

Available Rules

Rule	Code
Optional Parameter Before Required	optional-param-order

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optional-param-order

            Detects optional parameters defined before required parameters in function-like declarations.

Such parameter order is considered deprecated; required parameters should precede optional parameters.

Requirements

• PHP Version: PHP >= 8.0.0

Configuration

Option	Type	Default
enabled	boolean	true
level	string	"warning"

Examples

Correct Code

<?php

function foo(string $required, ?string $optional = null): void {}

Incorrect Code

<?php

function foo(?string $optional = null, string $required): void {}

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