我想将网页中的每个单词（不是标签）放在带有DOMDocument的数组中。
$content = '<html><body><h1>Some words</h1>';
$content .= '<p>here is some words <span>there is other words here</span></p>';
$content .= '</body></html>';
$dom = new DOMDocument();
@$dom->loadHTML($content);
$words = array();
// How to do that ?
由于