Make cURL output STDERR to file (or string)

Question

We\'re trying to debug some cURL errors on the server, and I would like to see the STDERR log. Currently, all we can see for our error is \"error code: 7\" and that we can\'

Answer 1

Putting al above answers together, I use this function to make a Curl Post Request with loggin to a file option:

function CURLPostRequest($url, array $post = NULL, array $options = array(), $log_file = NULL){
    $defaults = array(
            CURLOPT_POST => 1,
            CURLOPT_HEADER => 0,
            CURLOPT_URL => $url,
            CURLOPT_FRESH_CONNECT => 1,
            CURLOPT_RETURNTRANSFER => 1,
            CURLOPT_FORBID_REUSE => 1,
            CURLOPT_TIMEOUT => 4,
            CURLOPT_POSTFIELDS => http_build_query($post)
    );

    if (is_resource($log_file)){
        $defaults[CURLOPT_VERBOSE]=1;
        $defaults[CURLOPT_STDERR]=$log_file;
        $defaults[CURLINFO_HEADER_OUT]=1;
    }

    $ch = curl_init();
    curl_setopt_array($ch, ($options + $defaults));
    if( ! $result = curl_exec($ch)){
        throw new Exception(curl_error($ch));
    }

    if (is_resource($log_file)){

        $info = curl_getinfo($ch);

        if (isset($info['request_header'])){
            fwrite($log_file, PHP_EOL.PHP_EOL.'* POST Content'.PHP_EOL.PHP_EOL);
            fwrite($log_file, print_r($info['request_header'],true));
            fwrite($log_file, http_build_query($post));
        }

        fwrite($log_file, PHP_EOL.PHP_EOL.'* Response Content'.PHP_EOL.PHP_EOL);
        fwrite($log_file, $result.PHP_EOL.PHP_EOL);
    }

    curl_close($ch);
    return $result;
}

Hope this help to someone.