Határozott névelő hozzáadása egy szóhoz PHP-ban

artikulus.php

<?php

namespace Grammar\Hungarian;

class DefiniteArticle
{
    const CONSONANTS = [
        '0',
        '2',
        '3',
        '4',
        '6',
        '7',
        '8',
        '9',
        'b',
        'c',
        'd',
        'f',
        'g',
        'h',
        'j',
        'k',
        'l',
        'm',
        'n',
        'p',
        'q',
        'r',
        's',
        't',
        'v',
        'w',
        'x',
        'y',
        'z',
    ];

    const ARTICLE_FOR_CONSONANTS = 'a';

    const ARTICLE_FOR_VOWELS = 'az';

    public static function artikulus(string $word): string
    {
        $firstCharacter = mb_convert_case(mb_substr($word, 0, 1), MB_CASE_LOWER);
        $article = in_array($firstCharacter, self::CONSONANTS)
            ? self::ARTICLE_FOR_CONSONANTS
            : self::ARTICLE_FOR_VOWELS;

        // 10-19
        if (preg_match('/^1[0-9]\b/', $word) === 1) {
            $article = self::ARTICLE_FOR_CONSONANTS;
        }

        return sprintf('%s %s', $article, $word);
    }

    public static function artikulusSentence(string $word): string
    {
        return ucfirst(self::artikulus($word));
    }
}

echo DefiniteArticle::artikulus('Énekes'), "\n";
echo DefiniteArticle::artikulusSentence('cipő'), "\n";
echo DefiniteArticle::artikulus('11. nap'), "\n";

az Énekes
A cipő
a 11. nap