php一键获取html页面所有a标签路径

// 获取链接的HTML代码
$html = file_get_contents('路径');

$dom = new DOMDocument();
@$dom->loadHTML($html);

$xpath = new DOMXPath($dom);
$hrefs = $xpath->evaluate('/html/body//a');

for ($i = 0; $i < $hrefs->length; $i++) {
    $href = $hrefs->item($i);
    $url = $href->getAttribute('href');
    echo "'".$url."'".",".'<br />';
}