Question

这是我的代码，我想获得该id的href值

function file_get_contents_curl($url){
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_HEADER, 0);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($ch, CURLOPT_URL, $url);
            curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
            $data = curl_exec($ch);
            curl_close($ch);
            return $data;
}

    $str = 'someLink';
    $html = file_get_contents_curl($str);
        $doc = new DOMDocument();
        libxml_use_internal_errors(true);
        $doc->loadHTML('<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />' . $html);
        libxml_clear_errors();

        $nodes = $doc->getElementsByTagName('title');
        $hrefValue = $doc->getElementById('linker');

someLink html示例：

<html>

<head>
<title></title>
</head>

<body>

<div>one</div>

<div>two</div>

<div>
<a href="link" id="linker" />LINK HERE</a>
</div>

</body>

</html>

我想获取id =“linker”的href值。我尝试使用getElementById（）但它不会返回任何内容

Answer 1

$nodes = $doc->getElementsByTagName('title')->item(0)->nodeValue;
        $hrefValue = $doc->getElementById('linker')->getAttribute("href");

Answer 2

preg_match('/href=[\'"]?(.+?)[\'"]?.*?id=[\'"]?linker[\'"]?/si', $subject, $matches);
var_dump($matches);

获取具有特定ID的标记href值

2 个答案: