使用php从URL字符串中捕获值

Question

I need to extract a variable's value from a string, which happens to be a URL. The string/url is loaded as part of a separate php query, not the url in the browser.

The url's will look like:

index.php?option=com_content&view=article&catid=334:golfeq&id=2773:xcelsiors&Itemid=44

How can I always find & capture the value of the id which in this example is 2773?

I read several examples already, but what I've tried captures the id value of the current page which is being viewed in the browser, and not the URL string.

Thanks

Answer 1

You are looking for a combination or parse_url (which will isolate the query string for you) and parse_str (which will parse the variables and put them into an array).

For example:

$url = 'index.php?option=com_content&view=article&catid=334:golfeq&id=2773:xcelsiors&Itemid=44';

// This parses the url for the query string, and parses the vars from that
// into the array $vars (which is created on the spot).
parse_str(parse_url($url, PHP_URL_QUERY), $vars);

print_r($vars); // see what's in there

// Parse the value "2773:xcelsiors" to isolate the number
$id = reset(explode(':', $vars['id']));

// This will also work:
$id = intval($vars['id']);

echo "The id is $id
";

See it in action.