Question

I am using Curl in PHP to call an API.

According to their documentation, they are returning “Authentication-Callback” within the returned page’s header.

It works perfectly when I paste the URL into the browser, but Curl seems to leave it out.

Here is my code

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, 'http://api.themoviedb.org/3/authentication/token/new?api_key=[MY_API_KEY]&language=en');
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_FAILONERROR, 1);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

    $results = curl_exec($ch);
    $headers = curl_getinfo($ch);

Here is the returned header

Array
    (
        [url] => http://api.themoviedb.org/3/authentication/token/new?api_key=[MY_API_KEY]&language=en&
        [content_type] => application/json;charset=utf-8
        [http_code] => 200
        [header_size] => 470
        [request_size] => 137
        [filetime] => -1
        [ssl_verify_result] => 0
        [redirect_count] => 0
        [total_time] => 0.109
        [namelookup_time] => 0
        [connect_time] => 0.047
        [pretransfer_time] => 0.047
        [size_upload] => 0
        [size_download] => 116
        [speed_download] => 1064
        [speed_upload] => 0
        [download_content_length] => 116
        [upload_content_length] => 0
        [starttransfer_time] => 0.109
        [redirect_time] => 0
        [certinfo] => Array
            (
            )

    )

As far as I can tell, everything is right. Curl returns the data that I need perfectly, just not the correct headers.

Any help is appreciated!

Answer 1

What you’re doing right now is getting stored information about the header via curl_getinfo() which only gets the information in the OPT list on that page.

What you should do instead is to return the header and then manually separate it:

curl_setopt($ch, CURLOPT_HEADER, 1);
// The rest of your options
$output = curl_exec($ch);

// Since the end of the header is always delimited by two newlines
$output = explode("\n\n", $output, 2);
$header = $output[0];
$content = $output[1];

This is more work but will get you the real headers.