Onward ticket(flight)

To build an onward ticket system for visa approval, you can make use of various flight booking APIs available. These APIs allow you to search for flights, make reservations, and retrieve booking details.

One popular flight booking API is the Amadeus for Developers API. It provides a wide range of functionalities for flight booking, including searching for flights, retrieving flight details, and making reservations.

Here's an example of how you can use the Amadeus API to search for flights:

// Install the Amadeus SDK using Composer
composer require amadeus/amadeus-php

// Import the necessary classes
use Amadeus\Client\Struct\Air\MultiAvailability\RequestOptions;
use Amadeus\Client\RequestOptions\Air\MultiAvailabilityOptions;
use Amadeus\Client\Result;

// Create an instance of the Amadeus API client
$client = new \Amadeus\Client();

// Set your API credentials
$client->setCredentials('YOUR_CLIENT_ID', 'YOUR_CLIENT_SECRET');

// Create a request to search for flights
$requestOptions = new MultiAvailabilityOptions([
    'origin' => 'JFK',
    'destination' => 'LAX',
    'departureDate' => '2022-01-01',
    'returnDate' => '2022-01-05',
]);

// Send the request and retrieve the flight results
$response = $client->air()->multiAvailability($requestOptions);

// Process the flight results
if ($response instanceof Result\Air\MultiAvailability) {
    foreach ($response->getResponse()->data->itineraries as $itinerary) {
        echo "Flight: {$itinerary->origin} to {$itinerary->destination}\n";
        echo "Departure: {$itinerary->departureDateTime}\n";
        echo "Arrival: {$itinerary->arrivalDateTime}\n";
        echo "Price: {$itinerary->price}\n";
        echo "\n";
    }
}

Note that you'll need to sign up for an account with Amadeus for Developers and obtain your own client ID and client secret. Replace 'YOUR_CLIENT_ID' and 'YOUR_CLIENT_SECRET' with your actual credentials.

This is just one example using the Amadeus API. There are other flight booking APIs available, such as Skyscanner, Expedia, and Travelport, which you can explore based on your specific requirements.

Remember to review the documentation of the chosen API to understand its capabilities and pricing structure.