How can I get the destination URL using cURL?

You can use:

echo curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);

$ch = curl_init($url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);curl_setopt($ch, CURLOPT_HEADER, TRUE); // We'll parse redirect url from header.curl_setopt($ch, CURLOPT_FOLLOWLOCATION, FALSE); // We want to just get redirect url but not to follow it.$response = curl_exec($ch);preg_match_all('/^Location:(.*)$/mi', $response, $matches);curl_close($ch);echo !empty($matches[1]) ? trim($matches[1][0]) : 'No redirect found';

A bit dated of a response but wanted to show a full working example, some of the solutions out there are pieces:

    $ch = curl_init();    curl_setopt($ch, CURLOPT_URL, $url); //set url    curl_setopt($ch, CURLOPT_HEADER, true); //get header    curl_setopt($ch, CURLOPT_NOBODY, true); //do not include response body    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); //do not show in browser the response    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); //follow any redirects    curl_exec($ch);    $new_url = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL); //extract the url from the header response    curl_close($ch);

This works with any redirects such as 301 or 302, however on 404's it will just return the original url requested (since it wasn't found). This can be used to update or remove links from your site. This was my need anyway.