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<?php namespace Core\Bundle\Service\Property\Room\Rooms; class CountryMapping { const CZ = 'CZ'; const EN = 'EN'; public function get(string $countryIsoCode = null) : string // Works correctly if return type is removed { switch (strtoupper($countryIsoCode)) { case 'CZ': case 'SK': return self::CZ; // Works correctly if changed to CountryMapping::CZ default: return self::EN; // Works correctly if changed to CountryMapping::EN } } } $mapping = new CountryMapping(); var_dump($mapping->get('CZ'));
Output for git.master, git.master_jit, rfc.property-hooks
string(2) "CZ"

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