<?php namespace SebastianBergmann\CodeCoverage\TestFixture; use stdClass; use function array_filter; use const ARRAY_FILTER_USE_BOTH; class C { public function m(): void { $o = new stdClass; array_filter( ['a' => 1, 'b' => 2, 'c' => 3, 'd' => 4], static function ($v, $k) { return $k === 'b' || $v === 4; }, ARRAY_FILTER_USE_BOTH ); } }