How to get info on sent PHP curl request

If you set CURLINFO_HEADER_OUT to true, outgoing headers are available in the array returned by curl_getinfo(), under request_header key:

$ch = curl_init();curl_setopt($ch, CURLOPT_URL, "http://foo.com/bar");curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);curl_setopt($ch, CURLOPT_USERPWD, "someusername:secretpassword");curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);curl_setopt($ch, CURLINFO_HEADER_OUT, true);curl_exec($ch);$info = curl_getinfo($ch);print_r($info['request_header']);

This will print:

GET /bar HTTP/1.1Authorization: Basic c29tZXVzZXJuYW1lOnNlY3JldHBhc3N3b3JkHost: foo.comAccept: */*

Note the auth details are base64-encoded:

echo base64_decode('c29tZXVzZXJuYW1lOnNlY3JldHBhc3N3b3Jk');// prints: someusername:secretpassword

Also note that username and password need to be percent-encoded to escape any URL reserved characters (/, ?, &, : and so on) they might contain:

curl_setopt($ch, CURLOPT_USERPWD, urlencode($username).':'.urlencode($password));

You can also use a proxy tool like Charles to capture the outgoing request headers, data, etc. by passing the proxy details through CURLOPT_PROXY to your curl_setopt_array method.

For example:

$proxy = '127.0.0.1:8888';$opt = array (    CURLOPT_URL => "http://www.example.com",    CURLOPT_PROXY => $proxy,    CURLOPT_POST => true,    CURLOPT_VERBOSE => true,    );$ch = curl_init();curl_setopt_array($ch, $opt);curl_exec($ch);curl_close($ch);

curl_getinfo() must be added before closing the curl handler

$ch = curl_init();curl_setopt($ch, CURLOPT_URL, "http://example.com/bar");curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);curl_setopt($ch, CURLOPT_USERPWD, "someusername:secretpassword");curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);curl_setopt($ch, CURLINFO_HEADER_OUT, true);curl_exec($ch);$info = curl_getinfo($ch);print_r($info['request_header']);curl_close($ch);