dongshou1856 2016-07-16 22:50
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如何在<body>中获取<a>标签，但不包括页眉和页脚部分

If I have a webpage like this:

<body>
  <header>
    <a href='http://domain1.com'>link 1 text</a>
  </header>

  <a href='http://domain2.com'>link 2 text</a>

  <footer>
    <a href='http://domain3.com'>link 3 text</a>
  </footer>
</body>

How do I pull the <a> tags out of the <body> but exclude the links from <header> and <footer>?

In the real web page, there will be a lot of <a> tags in the <header> so I'd rather not have to cycle through ALL of them.

I want to pull out the URLs and anchor text from each of the <a> tags that are NOT inside the <header> or <footer> tags.

EDIT: this is how I find links in the header:

$header = $html->find('header',0);
foreach ($header->find('a') as $a){
  do something
}

I would like to do this (note the use of "!")

$foo = $html->find('!header,!footer');
foreach ($foo->find('a') as $a){
  do something
}
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3条回答 默认 最新

  • duanli9591 2016-07-16 23:07
    关注

    Remove the header and footer from the DOM you are working with before looking for the links.

    <?php
    include("simple_html_dom.php");
    $source = <<<EOD
    <body>
        <header>
            <a href='http://domain1.com'>link 1 text</a>
        </header>

        <a href='http://domain2.com'>link 2 text</a>

        <a href='http://domain4.com'>link 4 text</a>

        <footer>
            <a href='http://domain3.com'>link 3 text</a>
        </footer>
    </body>
EOD;

    $html = str_get_html($source);
    foreach ($html->find('header, footer') as $unwanted) {
        $unwanted->outertext = "";
    }
    $html->load($html->save()); 
    $links = $html->find("a");
    foreach ($links as $link) {
        print $link;
};

?>
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