PayPal Payment Integration with PHP, Laravel and Symfony

What is PayPal and online payment processing. How we will learn it

What we will learn and learning paths

Present all applications that we will build in this course - shopping cart and subscription service made 3 times from scratch (PHP, Laravel, Symfony = 6 apps)

Explain entire checkout flow from choosing product or products on the website up to payment confirmation

Why it is better to use PayPal Express Checkout than PayPal Standard

Explain entire checkout flow from choosing subscription on the website up to payment confirmation

About PayPal's software development kits and application programming interfaces

What websites and libraries I used to build html templates for shopping cart website and simple subscription application

Divide html code to header, footer and views. Move it to php app

We are building MVC-based application so first thing is to create Router class that calls a controller for loading a view based on url parameter

Instead of handling requests directly in the Router make controller for this and call it from the Router

Create database with sample shop products. Make Products model for interacting with the database

Fetch shop products from the database and display them on the main page

Start session and create FakeLogin class

Use FakeLogin class to authenticate users. Display logged in user data on the website

Create ShoppingCart class and use it to add item to cart

Show total price and total amount of products in shopping cart. Create method for updating total price and total amount

Display products from shopping cart on cart page

Display products from shopping cart on checkout page

Update product quantities

Delete products from cart. Make use of session

Create PayPal business account to accept payments from buyers. Create sandbox accounts. Create REST API application (inside PayPal account) to receive http calls for live transactions

Send products from user session cart to PayPal through its api

Execute and confirm PayPal payment and store payment details on the buyer side

Divide html code to header, footer and views. Move it to php app

We are building MVC-based application so first thing is to create Router class that calls a controller for loading a view based on url parameter

Instead of handling requests directly in the Router make controller for this and call it from the Router

Create and use FakeLogin class to authenticate users. Display logged in user data on the website

Authorize users to show them videos

Create simple file database to store subscription status (whether it is active or not)

Create PayPal business account to accept subscriptions from subscribers. Create sandbox accounts. Create REST API application (inside PayPal account) to receive http calls for live transactions

Administrator must first create a billing plan to allow subscribers to subscribe to

Activate created billing plan. Use __call magic class method to handle easier PayPal methods

Show all subscriptions plans that an administrator created

Administrator can delete subscription plan

A user that wants to subscribe, first has to create subscription agreement

After creating subscription agreement the user has to log in to his PayPal account and confirm the agreement

We need to deploy our subscription application to live server because we are going to test cancelling subscription functionality (a user may cancel his subscription and then PayPal must talk to our server to inform us what happened)

Deploy subscription application to Heroku live server & live domain

A user may cancel his subscription manually every time or subscription may expire itself. In such situations we need to reject access to video service in our application

Install Laravel app. Divide html code to header, footer and views. Move it to Laravel app

Instead of loading views from the routing file, make a controller for this

Create sqlite database connection and migration file to create database tables

Create database seeder to fill database with sample product data

Fetch data from the database and display shop products on the website

Create shopping cart service & addToCart method. We use session to store chosen shop products

A user adds products to shopping cart. Display them on the cart subpage

A user finishes adding products to shopping cart and wants to pay. Display products on the checkout subpage

Calculate total price and total amount of products that a client purchased. Then display it on the page

Delete a product from the shopping cart and update total amount & price

Update product quantities

In Laravel framework making login and registration functionality is a breeze

We need to send products to PayPal after collecting them in shopping cart. Create controller method for this. Only users logged in are allowed to perform this action

Install PayPal RestApi package using composer. Create PayPal account. Create PayPal service inside Laravel app and finish creating payment

After creating a payment and login in to PayPal account, a user must confirm his payment

Install Laravel app. Divide html code to header, footer and views. Move it to Laravel app

Instead of loading views from the routing file, make a controller for this

Create sqlite database connection and migration file to create users table in the database

In Laravel framework making login and registration functionality is a breeze

An administrator first must create a billing plan that a subscriber will be subscribed to. Install PayPal Rest Api composer package. Create PayPal controller & method

After an administrator creates a plan, he needs to activate it to allow a user to subscribe to it. Create a trait to get PayPal rest app credentials

Display all plans data that the administrator created

The administrator can delete subscription plan

Only an administrator can create subscription plans, delete them, etc.

After the administrator created a subscription plan and activated it, a user is able to subscribe to it. First he has to creeate an agreement

After a user log in to his PayPal account he must confirm the subscription agreement (execute it)

We need to test cancelling subscription by the user. And because of that we need to upload our app to live server

Webhook handler handles PayPal request to our application if a user cancels his subscription or it expires, etc.

Deploy subscription application to Heroku and test cancelling subscription

Install Symfony app. Divide html code to header, footer and views. Move it to Symfony app

Create database connection and Product entity to operate on cart products

Load sample shop products data using fixtures in Symfony so that they are ready to be displayed on the page

After we created database and sample product data, we are able to display it on the website

Make links between application pages and create method for adding a product to the cart

Create Shopping Cart service and method for adding products to shopping cart. First we need to create a special session service to handle multilevel array values stored in the session

A user adds products to cart. We store them in the session and display on the cart page

After a user adds products to cart we need to update total quantity and total price in shopping cart

After a user added products to the cart he can display it on the checkout page

Remove product from the cart by clearing session item

A user may want to change product quantities. We have to handle this

Create a special user entity for authentication purposes. Create entire login scaffolding (login form, etc.) with one console command

Create registration system in Symfony with one console command

Create logout functionality. Recognize that a user is logged in or not

Install PayPal SDK and use it to create payment. Create PayPal sandbox account

After creating a payment and login in to PayPal account, a user must confirm his payment for shopping cart products