(PHP Extension) Hotmail Refresh Access Token (also for Live.com, Outlook.com)

See more OAuth2 Examples

An OAuth2 access token is typically valid for 1 hour. Interaction with the Hotmail account owner via a browser is only needed for getting the initial access token. Once you have it, it can be continually refreshed without user interaction for a long time.

See: How Long can an OAuth2 Access Token be Refreshed?

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

include("chilkat.php");
// Use "chilkat_9_5_0.php" for versions of Chilkat < 10.0.0

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// It is assumed we previously obtained an OAuth2 access token.

// Note: Refreshing an access token does not require user-interaction.  
// Only the act of getting the initial access token requires interactive authorization from the Hotmail account owner 
// (i.e. a browser is displayed and the Hotmail account owner authorizes access by the app).

// Once you have the initial access token, it can be refreshed for a long time.
// A typical strategy is to write your application to automatically refresh the access token 
// when authentication fails, and then retry the operation with the new access token.

$jsonToken = new CkJsonObject();
$success = $jsonToken->LoadFile('qa_data/tokens/hotmail.json');
if ($success != true) {
    print 'Failed to load office365.json' . "\n";
    exit;
}

// The access token JSON looks like this:

// {
//   "token_type": "Bearer",
//   "scope": "https://outlook.office.com/SMTP.Send https://outlook.office.com/IMAP.AccessAsUser.All https://outlook.office.com/POP.AccessAsUser.All",
//   "expires_in": 3600,
//   "ext_expires_in": 3600,
//   "access_token": "EwBoA+ ... 7pOYcWr5pFwQgI=",
//   "refresh_token": "M.C546_BL2.0.U.-CkW ... g5CKSlDBQ$$",
//   "id_token": "eyJ0e ... 2iiu5iqBK9n7s3A"
// }

$oauth2 = new CkOAuth2();

// See Microsoft OAuth2 Authorization Endpoint
$oauth2->put_TokenEndpoint('https://login.microsoftonline.com/common/oauth2/v2.0/token');

// Replace this with your actual App Registration's Application (client) ID.
$oauth2->put_ClientId('CLIENT_ID');

// Get the "refresh_token"
$oauth2->put_RefreshToken($jsonToken->stringOf('refresh_token'));

// Send the HTTP POST to refresh the access token..
$success = $oauth2->RefreshAccessToken();
if ($success != true) {
    print $oauth2->lastErrorText() . "\n";
    exit;
}

print $oauth2->lastErrorText() . "\n";

print 'New access token: ' . $oauth2->accessToken() . "\n";
print 'New refresh token: ' . $oauth2->refreshToken() . "\n";

// Update the JSON with the new tokens.
$jsonToken->UpdateString('access_token',$oauth2->accessToken());
$jsonToken->UpdateString('refresh_token',$oauth2->refreshToken());

// Save the new JSON access token response to a file.
$sbJson = new CkStringBuilder();
$jsonToken->put_EmitCompact(false);
$jsonToken->EmitSb($sbJson);
$sbJson->WriteFile('qa_data/tokens/hotmail.json','utf-8',false);

print 'OAuth2 authorization granted!' . "\n";
print 'New Access Token = ' . $oauth2->accessToken() . "\n";

?>