Installier zuerst unsere Library mit Composer:
            $ composer require gender-api/client
use GenderApi\Client as GenderApiClient;
try {
    $apiClient = new GenderApiClient('insert your API key');
    
    $lookup = $apiClient->getByFirstName('elisabeth');
    if ($lookup->genderFound()) {
        echo $lookup->getGender();      
    }
    
    $lookup = $apiClient->getByFirstNameAndLastNameAndCountry('Thomas Johnson', 'US');
    if ($lookup->genderFound()) {
        echo $lookup->getGender();      
        echo $lookup->getFirstName();   
        echo $lookup->getLastName();    
    }
} catch (GenderApi\Exception $e) {
    
    
    echo 'Exception: ' . $e->getMessage();
}
          Link zur Client-Dokumentation auf Github:
          
            https://github.com/markus-perl/gender-api-client