PHP_CodeSniffer standard enforcing snake_case naming for local variables and function/method parameters. Class properties are intentionally excluded.

composer require --dev drevops/phpcs-standard

The standard is automatically registered via phpcodesniffer-composer-installer.

Verify: vendor/bin/phpcs -i (should list DrevOps)

# Check code
vendor/bin/phpcs --standard=DrevOps path/to/code

# Auto-fix
vendor/bin/phpcbf --standard=DrevOps path/to/code

Create phpcs.xml:

<?xml version="1.0"?>
<ruleset name="Project Standards">
  <rule ref="DrevOps"/>
  <file>src</file>
  <file>tests</file>
</ruleset>

Use individual sniffs:

<ruleset name="Custom Standards">
  <rule ref="DrevOps.NamingConventions.LocalVariableSnakeCase"/>
  <rule ref="DrevOps.NamingConventions.ParameterSnakeCase"/>
</ruleset>

Enforces snake_case for local variables inside functions/methods.

function processOrder() {
    $order_id = 1;        // ✓ Valid
    $orderId = 1;         // ✗ Error: VariableNotSnakeCase
}

Excludes:

• Function/method parameters (handled by ParameterSnakeCase)
• Class properties (not enforced)
• Reserved variables ($this, $_GET, $_POST, etc.)

DrevOps.NamingConventions.LocalVariableSnakeCase.NotSnakeCase

// phpcs:ignore DrevOps.NamingConventions.LocalVariableSnakeCase.NotSnakeCase
$myVariable = 'value';

Enforces snake_case for function/method parameters.

function processOrder($order_id, $user_data) {  // ✓ Valid
function processOrder($orderId, $userData) {    // ✗ Error: ParameterNotSnakeCase

Excludes:

• Parameters inherited from interfaces/parent classes
• Parameters in interface/abstract method declarations
• Class properties (including promoted constructor properties)

DrevOps.NamingConventions.ParameterSnakeCase.NotSnakeCase

// phpcs:ignore DrevOps.NamingConventions.ParameterSnakeCase.NotSnakeCase
function process($legacyParam) {}

composer install       # Install dependencies
composer test          # Run tests
composer test-coverage # Run tests with coverage
composer lint          # Check code standards
composer lint-fix      # Fix code standards

GPL-3.0-or-later

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