php - 标记 href 属性中的正则表达式查询字符串

Question

I would like to regex a query string which is contained in a href attribute of a tag. My aim is to get, for example, the page number of this a tag:

<a class="page-numbers" href="/website/admin/back.php?page=my_page&amp;pagenum=2&amp;id=12">next</a>

I would like to get the query pagenum . Is there a way to directly get it with a regex or someting like this?

Here my code:

$page_link = '<a class="page-numbers" href="/website/admin/back.php?page=my_page&amp;pagenum=3&amp;id=12">next</a>';

$page_nb = preg_match('/<a href="(.+)">/', $page_link, $matches);
$page_nb = (isset($matches[1])) ? $matches[1] : $page_nb;
$page_nb = parse_str(parse_url($page_nb, PHP_URL_QUERY), $params);
$page_nb = $params['pagenum'];

EDIT : I need this number because I will use it for a query. The page number text not necessarily corresponds to the query page number. And the pagination can be a little bit complex. I just need to retrieve this information for some stuff not relating on clicking on the button.

Answer 1

Where do you get that string from? do you get it from a db? api? is it hardcoded?

In your current code it looks like it's hardcoded, so why don't just do:

$pagenum = 3;
$page_link = '<a class="page-numbers" href="/website/admin/back.php?page=my_page&amp;pagenum=". $pagenum . "&amp;id=12">next</a>';