How to use Google Search Console API and PHP code to index url web page

Here's an example of PHP code to connect to the Google Search Console API and index a URL: 

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

// Replace with your own values
$clientId = 'YOUR_CLIENT_ID';
$clientSecret = 'YOUR_CLIENT_SECRET';
$redirectUri = 'YOUR_REDIRECT_URI';
$accessToken = 'YOUR_ACCESS_TOKEN';
$refreshToken = 'YOUR_REFRESH_TOKEN';

// Create a new Google Client
$client = new Google_Client();
$client->setClientId($clientId);
$client->setClientSecret($clientSecret);
$client->setRedirectUri($redirectUri);
$client->setAccessType('offline');
$client->setApprovalPrompt('force');

// Set the access and refresh tokens
$client->setAccessToken($accessToken);
$client->refreshToken($refreshToken);

// Create a new Google_Service_Webmasters object
$service = new Google_Service_Webmasters($client);

// Replace with your own website URL
$websiteUrl = 'https://www.example.com/';

// Define the URL to be indexed
$url = new Google_Service_Webmasters_UrlCrawlErrorsSample();
$url->setUrl($websiteUrl);

try {
    // Request indexing for the URL
    $response = $service->urlTestingTools->mobileFriendlyTest($url);
    
    // Check if the request was successful
    if ($response->testStatus->status === 'COMPLETE') {
        // URL indexing request was successful
        echo 'URL indexed successfully.';
    } else {
        // URL indexing request failed
        echo 'URL indexing failed.';
    }
} catch (Exception $e) {
    echo 'An error occurred: ' . $e->getMessage();
}

Make sure you replace the placeholder values with your actual client ID, client secret, redirect URI, access token, refresh token, and website URL.

This code uses the Google API PHP Client library (google/apiclient) to authenticate with the Google Search Console API and make the indexing request. You need to install the library via Composer and require the autoloader (require_once 'vendor/autoload.php';) in your PHP script.

Please note that this is just a basic example to get you started. You may need to adjust the code according to your specific requirements and the specific endpoints and methods provided by the Google Search Console API.