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PHP code example of stephencoduor / oauth2-canvaslms

1. Go to this page and download the library: Download stephencoduor/oauth2-canvaslms library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php.

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

stephencoduor / oauth2-canvaslms example snippets


use stephencoduor\OAuth2\Client\Provider\CanvasLMS;

session_start();

/* anti-fat-finger constant definitions */
define('CODE', 'code');
define('STATE', 'state');
define('STATE_LOCAL', 'oauth2-state');

/* Instantiate the class and pass the  '/' . $_SERVER['SCRIPT_NAME'],
    'canvasInstanceUrl' => 'https://canvas.instructure.com'
]);

/* if we don't already have an authorization code, let's get one! */
if (!isset($_GET[CODE])) {
    $authorizationUrl = $provider->getAuthorizationUrl();
    $_SESSION[STATE_LOCAL] = $provider->getState();
    header("Location: $authorizationUrl");
    exit;

/* check that the passed state matches the stored state to mitigate cross-site request forgery attacks */
} elseif (empty($_GET[STATE]) || $_GET[STATE] !== $_SESSION[STATE_LOCAL]) {
    unset($_SESSION[STATE_LOCAL]);
    exit('Invalid state');

} else {
    /* try to get an access token (using our existing code) */
    $token = $provider->getAccessToken('authorization_code', [CODE => $_GET[CODE]]);

    /* do something with that token... (probably not just print to screen, but whatevs...) */
    echo $token->getToken();
    exit;
}