Title.php

<?php
declare(strict_types = 1);

namespace Embed\Detectors;

class Title extends Detector
{
    public function detect(): ?string
    {
        $oembed = $this->extractor->getOEmbed();
        $document = $this->extractor->getDocument();
        $metas = $this->extractor->getMetas();

        return $oembed->str('title')
            ?: $metas->str(
                'og:title', 
                'twitter:title', 
                'lp:title', 
                'dcterms.title', 
                'article:title', 
                'headline', 
                'article.headline', 
                'parsely-title'
            )
            ?: $document->select('.//head/title')->str();
    }
}