获取CURLOPT_FOLLOWLOCATION重定向URL列表

Question

How can I get a list of URLs that CURL follows when loading a page with a CURLOPT_FOLLOWLOCATION set to True?

I know there is a curl_getinfo($ch, CURLINFO_EFFECTIVE_URL) function, but that returns just the last URL.

Answer 1

The following code should work for you, which uses the CURLOPT_HEADERFUNCTION cURL option:

$locations = array();

$curl = curl_init($url);
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($curl, CURLOPT_HEADERFUNCTION, function($curl, &$header) use(&$locations) {
    $key = 'Location:';
    if (strpos($header, $key) === 0) {
        $locations[] = trim(substr($header, strlen($key)));
    }
    return strlen($header);
});
// ...
curl_exec($curl);

$locations will contain the URLs that cURL was redirected to.