Get a thumbnail from Vimeo private videos

get-vimeo-private-video-thumb.php

<?php
// You need Vimeo API https://github.com/vimeo/vimeo.php
require 'path-to-your-lib/vimeo/vimeo.php';

// Get this from your account
$vimeo_client_id 		= 'xxxxx';
$vimeo_client_secret 	= 'xxxxxxxxxxx';

// This has to be generated on your site, plugin or theme
$vimeo_token 			= 'xxxxxx';

$callback_url = 'http://yourdomain/path-to-get-token.php';

// If you don't have a token yet
if ( ! empty( $vimeo_client_id ) && ! empty( $vimeo_client_secret ) ) {
	// Create vimeo API object with data
    $vimeo = new Vimeo( $vimeo_client_id, $vimeo_client_secret );

    $_SESSION['state'] = $state = base64_encode(openssl_random_pseudo_bytes(30));
    
    // Create URL for special link call and our callback url
    $vimeo_oauth_url = $vimeo->buildAuthorizationEndpoint($callback_url, 'private', $state);

	echo '<a href="' . $vimeo_oauth_url . '">Authenticate on Vimeo</a>';
}

/*
 * Handle Vimeo response for token
 *
 */
if ( isset($_GET['code']) && ! empty($_GET['code']) ) {
	$code = $_GET['code'];
	$state = $_GET['state'];

	$vimeo_rquest = $vimeo->accessToken($code, $callback_url);

	if ($vimeo_rquest['status'] == 200) {
		/* 
		 * Vimeo API token
		 * Save it on database or transient
		 */
		$vimeo_token = $vimeo_rquest['body']['access_token'];

		// Will save it on this session for now
		$_SESSION['access_token'] = $vimeo_token;
	} else {
		echo "Unsuccessful authentication";
	}
}

$video_id = '12345';

$vimeo = new Vimeo( $vimeo_client_id, $vimeo_client_secret );

$vimeo->setToken( $vimeo_token );

$result = $vimeo->request('/videos/' . $video_id);

// Video width and height
$video_w = $result['body']['width'];
$video_h = $result['body']['height'];

// Data for thumbnail with index 1
$thumb_data = $result['body']['pictures'][1];

// This is your thumbnail URL
$thumb_url = $thumb_data['link'];