SimplePie::get_contributors(): array|null

2519    public function get_contributors()2520    {2521        $contributors = [];2522        foreach ((array) $this->get_channel_tags(self::NAMESPACE_ATOM_10, 'contributor') as $contributor) {2523            $name = null;2524            $uri = null;2525            $email = null;2526            if (isset($contributor['child'][self::NAMESPACE_ATOM_10]['name'][0]['data'])) {2527                $name = $this->sanitize($contributor['child'][self::NAMESPACE_ATOM_10]['name'][0]['data'], self::CONSTRUCT_TEXT);2528            }2529            if (isset($contributor['child'][self::NAMESPACE_ATOM_10]['uri'][0]['data'])) {2530                $uri = $this->sanitize($contributor['child'][self::NAMESPACE_ATOM_10]['uri'][0]['data'], self::CONSTRUCT_IRI, $this->get_base($contributor['child'][self::NAMESPACE_ATOM_10]['uri'][0]));2531            }2532            if (isset($contributor['child'][self::NAMESPACE_ATOM_10]['email'][0]['data'])) {2533                $email = $this->sanitize($contributor['child'][self::NAMESPACE_ATOM_10]['email'][0]['data'], self::CONSTRUCT_TEXT);2534            }2535            if ($name !== null || $email !== null || $uri !== null) {2536                $contributors[] = $this->registry->create(Author::class, [$name, $uri, $email]);2537            }2538        }2539        foreach ((array) $this->get_channel_tags(self::NAMESPACE_ATOM_03, 'contributor') as $contributor) {2540            $name = null;2541            $url = null;2542            $email = null;2543            if (isset($contributor['child'][self::NAMESPACE_ATOM_03]['name'][0]['data'])) {2544                $name = $this->sanitize($contributor['child'][self::NAMESPACE_ATOM_03]['name'][0]['data'], self::CONSTRUCT_TEXT);2545            }2546            if (isset($contributor['child'][self::NAMESPACE_ATOM_03]['url'][0]['data'])) {2547                $url = $this->sanitize($contributor['child'][self::NAMESPACE_ATOM_03]['url'][0]['data'], self::CONSTRUCT_IRI, $this->get_base($contributor['child'][self::NAMESPACE_ATOM_03]['url'][0]));2548            }2549            if (isset($contributor['child'][self::NAMESPACE_ATOM_03]['email'][0]['data'])) {2550                $email = $this->sanitize($contributor['child'][self::NAMESPACE_ATOM_03]['email'][0]['data'], self::CONSTRUCT_TEXT);2551            }2552            if ($name !== null || $email !== null || $url !== null) {2553                $contributors[] = $this->registry->create(Author::class, [$name, $url, $email]);2554            }2555        }2556 2557        if (!empty($contributors)) {2558            return array_unique($contributors);2559        }2560 2561        return null;2562    }