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Stripe Recurring Payments With Stripe API & PHP Part 2

Disclaimer: This is a personal summary and interpretation based on a YouTube video. It is not official material and not endorsed by the original creator. All rights remain with the respective creators.

This document summarizes the key takeaways from the video. I highly recommend watching the full video for visual context and coding demonstrations.

Before You Get Started

  • I summarize key points to help you learn and review quickly.
  • Simply click on Ask AI links to dive into any topic you want.

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Overview of the Tutorial

  • Summary: This video continues from part 1, focusing on processing payments after the user submits credit card details on the pricing page. It covers verifying inputs, creating a user account in the database, sending login details via email, and redirecting to a thank you page.
  • Key Takeaway/Example: The flow starts with a pricing page offering three plans, each with a "Buy Now" button that posts to paymentProcess.php for handling subscriptions and account creation.
  • Link for More Details: Ask AI: Tutorial Overview

Verifying Payment Details

  • Summary: In paymentProcess.php, check for required POST data like product ID, Stripe token, and email. Redirect back to the pricing page (index.php) if anything is missing or invalid.
  • Key Takeaway/Example: Use an array to validate product IDs (e.g., [1 => 'plan_id_27', 2 => 'plan_id_67', 3 => 'plan_id_97']). 
    $products = [1 => 'plan_id_27', 2 => 'plan_id_67', 3 => 'plan_id_97'];
if (!isset($_GET['product_id']) || !in_array($_GET['product_id'], array_keys($products)) || !isset($_POST['stripeToken']) || !isset($_POST['stripeEmail'])) {
    header('Location: index.php');
    exit;
}
  • Link for More Details: Ask AI: Verifying Payment Details

Subscribing to the Plan

  • Summary: Once details are verified, use the Stripe API to create a customer and subscribe them to the selected plan based on the product ID.
  • Key Takeaway/Example: Dynamically select the plan ID from the array and create the subscription. 
    $plan_id = $products[$_GET['product_id']];
// Assuming Stripe setup from part 1, create customer and subscription
$customer = \Stripe\Customer::create([...]);
$subscription = \Stripe\Subscription::create(['customer' => $customer->id, 'items' => [['plan' => $plan_id]]]);
  • Link for More Details: Ask AI: Subscribing to Plans

Setting Up the Database

  • Summary: Create a database (e.g., 'stripe_recurring') and a 'users' table to store user details like email, plan, password, and registration date.
  • Key Takeaway/Example: Use phpMyAdmin or SQL to set up the table with fields: id (INT, auto_increment), email (VARCHAR 50), plan (VARCHAR 10), password (VARCHAR 255), registration_date (DATETIME). 
    CREATE TABLE users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    email VARCHAR(50),
    plan VARCHAR(10),
    password VARCHAR(255),
    registration_date DATETIME
);
  • Link for More Details: Ask AI: Database Setup

Generating and Hashing Passwords

  • Summary: Generate a random 10-character password, shuffle it, and hash it using password_hash() before storing in the database.
  • Key Takeaway/Example: Create a random string from a character set, shuffle, and take a substring. 
    $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
$password = substr(str_shuffle($chars), 0, 10);
$hashed_password = password_hash($password, PASSWORD_BCRYPT);
  • Link for More Details: Ask AI: Password Generation and Hashing

Inserting User into Database

  • Summary: After subscription, insert the user's email, plan ID, hashed password, and current datetime into the users table.
  • Key Takeaway/Example: Use mysqli to connect and insert. 
    $conn = new mysqli('localhost', 'root', '', 'stripe_recurring');
$escaped_email = $conn->real_escape_string($_POST['stripeEmail']);
$conn->query("INSERT INTO users (email, plan, password, registration_date) VALUES ('$escaped_email', '{$_GET['product_id']}', '$hashed_password', NOW())");
  • Link for More Details: Ask AI: Inserting Users

Sending Email with PHPMailer

  • Summary: Use PHPMailer to send an email with login details (email as username, generated password, and login link).
  • Key Takeaway/Example: Set up PHPMailer for Gmail SMTP. 
    use PHPMailer\PHPMailer\PHPMailer;
$mail = new PHPMailer(true);
$mail->isSMTP();
$mail->Host = 'smtp.gmail.com';
$mail->SMTPAuth = true;
$mail->Username = 'your@gmail.com';
$mail->Password = 'yourpassword';
$mail->SMTPSecure = 'ssl'; // or 'tls'
$mail->Port = 465; // or 587 for tls
$mail->setFrom('your@gmail.com', 'Your Name');
$mail->addAddress($escaped_email);
$mail->isHTML(true);
$mail->Subject = 'Your Login Details';
$mail->Body = "Hey,<br><br>Thank you for the purchase. Your login details:<br>Username: $escaped_email<br>Password: $password<br><br>Click here to login: <a href='login.php'>Login</a><br><br>Thanks";
$mail->send();
  • Link for More Details: Ask AI: Sending Emails with PHPMailer

Handling Email Errors

  • Summary: Catch email sending errors, like SMTP connection issues, and handle Gmail's less secure apps setting. Also, note potential port issues on shared hosting.
  • Key Takeaway/Example: If send fails, set an error flag and display details on the thank you page. Enable less secure apps in Gmail settings if needed.
  • Link for More Details: Ask AI: Email Error Handling

Redirecting to Thank You Page

  • Summary: After processing, redirect to thank_you.php, passing error status, password, email, and product ID via GET for fallback display if email fails.
  • Key Takeaway/Example: 
    header("Location: thank_you.php?error=$error&password=$password&user_email=$escaped_email&product_id={$_GET['product_id']}");
exit;
  • Link for More Details: Ask AI: Redirecting to Thank You

Creating the Thank You Page

  • Summary: On thank_you.php, display a thank you message. If email failed (error=1), show login details directly; otherwise, instruct to check inbox/spam.
  • Key Takeaway/Example: Use Bootstrap for simple layout. 
    <div class="container">
    <div class="row">
        <div class="col-md-12 text-center">
            <h2>Thank you for your purchase!</h2>
            <?php if ($_GET['error'] == 1): ?>
                <p>Your login details are included below:</p>
                <p>Username: <?php echo $_GET['user_email']; ?></p>
                <p>Password: <?php echo $_GET['password']; ?></p>
                <p>Click here to login: <a href="login.php">Login</a></p>
            <?php else: ?>
                <p>Please check your inbox/spam folder.</p>
            <?php endif; ?>
        </div>
    </div>
</div>
  • Link for More Details: Ask AI: Thank You Page

About the summarizer

I'm Ali Sol, a Backend Developer. Learn more: