What steps can be taken to ensure accurate results when dealing with irregular verbs like "esse" in a PHP Vokabeltrainer application?

When dealing with irregular verbs like "esse" in a PHP Vokabeltrainer application, it is important to create a custom function that handles the conjugation of the verb accurately. This function should account for the irregularities in the verb's conjugation and return the correct form based on the tense and subject pronoun provided. By creating a specific function for irregular verbs like "esse", you can ensure that the application produces accurate results when generating verb conjugations.

function conjugate_esse($tense, $subject) {
    $conjugations = array(
        'present' => array(
            'ego' => 'sum',
            'tu' => 'es',
            'is' => 'est',
            'nos' => 'sumus',
            'vos' => 'estis',
            'ei' => 'sunt'
        ),
        'imperfect' => array(
            'ego' => 'eram',
            'tu' => 'eras',
            'is' => 'erat',
            'nos' => 'eramus',
            'vos' => 'eratis',
            'ei' => 'erant'
        ),
        // Add more tenses as needed
    );

    return $conjugations[$tense][$subject];
}

// Example usage
echo conjugate_esse('present', 'ego'); // Output: sum
echo conjugate_esse('present', 'tu'); // Output: es
echo conjugate_esse('imperfect', 'nos'); // Output: eramus