<?php

// Valid: File which only declares OO structures, both global and namespaced.

abstract class fooA {
    // Methods within OO structures should be ignored by the sniff.
    function get() {}
    abstract function set();
}

interface fooB() {}

trait fooC() {}

enum fooD: string {}

namespace First;

class firstFooA() {}

trait firstFooB() {}

enum firstFooD: string {}

namespace Second;

interface secondFooA() {
    // Methods within OO structures should be ignored by the sniff.
    function get();
    function set();
}

if (!class_exists('secondFooB')) {
    class secondFooB() {}
}

enum secondFooD: string {}

// This sniff has no rules about side-effects.
$globVar = new class() {
    public function thisIsAnAnonymousClass() {}
};

$closure = function($a, $b) {
    return $a + $b;
};

$arrow = fn($a, $b) => $a + $b;

define('MY_CONSTANT', 'foo');

const ANOTHER_CONSTANT = 'bar';

while ( true ) {
    // Do something.
}