In this post, we learn Paypal payment gateway integration in Laravel step by step, Paypal Is a world-famous payment gateway and this is too easy with Laravel.

Create a PayPal account:

https://developer.paypal.com/

Step 1: Create a new Project

laravel new paypal

Step 2: Install the package omnipayvia the composer.

composer require league/omnipay omnipay/paypal

Step 3: Create some routes

app/routes/web.php

Route::post('pay', [App\Http\Controllers\paypalController::class, 'pay'])->name('paypal');
Route::get('success', [App\Http\Controllers\paypalController::class, 'success']);
Route::get('error', [App\Http\Controllers\paypalController::class, 'error']);
Route::get('myorder', [App\Http\Controllers\paypalController::class, 'myorder'])->name('myorder');

Step 4: Update the migration table 

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

return new class extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('paypals', function (Blueprint $table) {
            $table->id();
            $table->string('payment_id');
            $table->string('payer_id');
            $table->string('payer_email');
            $table->float('amount', 10, 2);
            $table->string('currency');
            $table->string('payment_status');
            $table->string('org_slug');
            $table->string('admin_email');
            $table->string('user_name');
            $table->string('admin_id');
            $table->string('slug');
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('paypals');
    }
};

Step 5: Make a Models

Step 6: Make a controller

php artisan make:controller PaypalController

controller code :

<?php

namespace App\Http\Controllers;

use App\Models\Payment;
use Illuminate\Http\Request;
use Omnipay\Omnipay;
class paypalController extends Controller
{
    private $gateway;

    public function __construct()
    {
        $this->gateway = Omnipay::create('PayPal_Rest');
        $this->gateway->setClientId(env('PAYPAL_CLIENT_ID'));
        $this->gateway->setSecret(env('PAYPAL_SECRET_ID'));
        $this->gateway->setTestMode(true);
    }

    public function pay(Request $request)
    {
        try {
            Log::info("pay success m kya aa rha h" . $request);

            $response = $this->gateway->purchase(array(
                'amount' => $request->amount,
                'org_slug' => $request->org_slug,
                'admin_email' => $request->admin_email,
                'user_name' => $request->user_name,
                'admin_id' => $request->admin_id,
                'slug' => $request->slug,
                'currency' => env('PAYPAL_CURRENCY'),
                'returnUrl' => url('success'),
                'cancelUrl' => url('error')
            ))->send();

            if ($response->isRedirect()) {
                $response->redirect();
                $request->session()->put('admin_id', $request->admin_id); 
                $request->session()->put('org_slug', $request->org_slug); 
                $request->session()->put('admin_email', $request->admin_email); 
                $request->session()->put('user_name', $request->user_name); 
                $request->session()->put('slug', $request->slug); 
            } else {
                return $response->getMessage();
            }
        } catch (\Throwable $th) {
            return $th->getMessage();
        }
    }

    public function success(Request $request)

    {

        Log::info("paypal success m kya aa rha h" . $request);
        if ($request->input('paymentId') && $request->input('PayerID')) {

            Log::info("paypal request m kya aa rha h" . $request);
            $transaction = $this->gateway->completePurchase(
                array(
                    'payer_id' => $request->input('PayerID'),
                    'admin_id' => $request->input('admin_id'),
                    'user_name' => $request->input('user_name'),
                    'slug' => $request->input('slug'),
                    'admin_email' => $request->input('admin_email'),
                    'org_slug' => $request->input('org_slug'),
                    'transactionReference' => $request->input('paymentId'),
                )
            );


            $response = $transaction->send();
           


            if ($response->isSuccessful()) {

                Log::info("response paypal success m kya aa rha h");

                $arr = $response->getData();

                $payment = new paypal();
                $payment->payment_id = $arr['id'];
                $payment->payer_id = $arr['payer']['payer_info']['payer_id'];
                $payment->payer_email = $arr['payer']['payer_info']['email'];
                $payment->amount = $arr['transactions'][0]['amount']['total'];
                $payment->currency = env('PAYPAL_CURRENCY');
                $payment->payment_status = $arr['state'];
                $payment->admin_id = $request->session()->get('admin_id');
                $payment->user_name = $request->session()->get('user_name');
                $payment->slug = $request->session()->get('slug');
                $payment->admin_email = $request->session()->get('admin_email');
                $payment->org_slug = $request->session()->get('org_slug');
                $payment->save();
                // Store the admin_id in the session
                // $request->session()->put('admin_id', $request->input('admin_id'));
                // return "Payment is Successfull. Your Transaction Id is : " . $arr['id'];
                return back()->with("success", "Payment is Successfull. Your Transaction Id is : " . $arr['id']);
            } else {
                return $response->getMessage();
            }
        } else {
            return back()->with("danger", "Payment declined!!");
        }
    }

    public function error()
    {
        return back()->with("danger", "User declined the payment!");
    }
}

Step 7: Update .env file with PayPal credential details.