使用 XPath

Created: November-22, 2018

$html = '<html><body><span class="text">Hello, World!</span></body></html>';

$doc = new DOMDocument();
$doc->loadHTML($html);

$xpath = new DOMXPath($doc);
$span = $xpath->query("//span[@class='text']")->item(0);

echo $span->textContent;

輸出：

Hello, World!