PHP Example using cURL with the v4 REST API to login and retrieve a session id

REST_PHP_login_example.php

<?php

$url = "http://{site_url}/service/v4/rest.php";
$username = "admin";
$password = "password";

//function to make cURL request
function call($method, $parameters, $url)
{
    ob_start();
    $curl_request = curl_init();

    curl_setopt($curl_request, CURLOPT_URL, $url);
    curl_setopt($curl_request, CURLOPT_POST, 1);
    curl_setopt($curl_request, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
    curl_setopt($curl_request, CURLOPT_HEADER, 1);
    curl_setopt($curl_request, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($curl_request, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($curl_request, CURLOPT_FOLLOWLOCATION, 0);

    $jsonEncodedData = json_encode($parameters);

    $post = array(
         "method" => $method,
         "input_type" => "JSON",
         "response_type" => "JSON",
         "rest_data" => $jsonEncodedData
    );

    curl_setopt($curl_request, CURLOPT_POSTFIELDS, $post);
    $result = curl_exec($curl_request);
    curl_close($curl_request);

    $result = explode("\r\n\r\n", $result, 2);
    $response = json_decode($result[1]);
    ob_end_flush();

    return $response;
}

//login ---------------------------------

$login_parameters = array(
     "user_auth"=>array(
          "user_name"=>$username,
          "password"=>md5($password),
          "version"=>"1"
     ),
     "application_name"=>"RestTest",
     "name_value_list"=>array(),
);

$login_result = call("login", $login_parameters, $url);

echo "<pre>";
print_r($login_result);
echo "</pre>";

//get session id
$session_id = $login_result->id;

?>

result.txt

stdClass Object
(
    [id] => lb7479svj8pjtf57ipmshepo80
    [module_name] => Users
    [name_value_list] => stdClass Object
        (
            [user_id] => stdClass Object
                (
                    [name] => user_id
                    [value] => 1
                )

            [user_name] => stdClass Object
                (
                    [name] => user_name
                    [value] => admin
                )

            [user_language] => stdClass Object
                (
                    [name] => user_language
                    [value] => en_us
                )

            [user_currency_id] => stdClass Object
                (
                    [name] => user_currency_id
                    [value] => -99
                )

            [user_is_admin] => stdClass Object
                (
                    [name] => user_is_admin
                    [value] => 1
                )

            [user_default_team_id] => stdClass Object
                (
                    [name] => user_default_team_id
                    [value] => 1
                )

            [user_default_dateformat] => stdClass Object
                (
                    [name] => user_default_dateformat
                    [value] => m/d/Y
                )

            [user_default_timeformat] => stdClass Object
                (
                    [name] => user_default_timeformat
                    [value] => h:ia
                )

            [user_number_seperator] => stdClass Object
                (
                    [name] => user_number_seperator
                    [value] => ,
                )

            [user_decimal_seperator] => stdClass Object
                (
                    [name] => user_decimal_seperator
                    [value] => .
                )

            [mobile_max_list_entries] => stdClass Object
                (
                    [name] => mobile_max_list_entries
                    [value] => 10
                )

            [mobile_max_subpanel_entries] => stdClass Object
                (
                    [name] => mobile_max_subpanel_entries
                    [value] => 3
                )

            [user_currency_name] => stdClass Object
                (
                    [name] => user_currency_name
                    [value] => US Dollars
                )

        )

)