How can I handle form submissions on the server side using a specific backend technology like Node.js or PHP?

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To handle form submissions on the server side using specific backend technologies like Node.js or PHP, you can follow these steps. Below are detailed examples for both Node.js (using Express.js) and PHP.
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Handling Form Submissions with Node.js (Express.js)

  1. Set Up Your Node.js Environment:
    • Initialize a new Node.js project: 
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      npm init -y
    • Install necessary packages: 
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      npm install express body-parser
  2. Create a Simple Form:
    • Create an HTML form in a file named index.html: 
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      <!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Registration Form</title>
</head>
<body>
    <h1>Registration Form</h1>
    <form action="/register" method="post">
        <label for="first-name">First Name:</label>
        <input type="text" id="first-name" name="first-name" required><br><br>
        <label for="last-name">Last Name:</label>
        <input type="text" id="last-name" name="last-name" required><br><br>
        <label for="email">Email:</label>
        <input type="email" id="email" name="email" required><br><br>
        <label for="password">Password:</label>
        <input type="password" id="password" name="password" required><br><br>
        <input type="submit" value="Register">
    </form>
</body>
</html>
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  1. Create the Server:
    • Create a file named server.js: 
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      const express = require('express');
const bodyParser = require('body-parser');
const app = express();
const port = 3000;

// Middleware to parse form data
app.use(bodyParser.urlencoded({ extended: true }));

// Serve the HTML form
app.get('/', (req, res) => {
    res.sendFile(__dirname + '/index.html');
});

// Handle form submission
app.post('/register', (req, res) => {
    const { firstName, lastName, email, password } = req.body;
    console.log(`First Name: ${firstName}`);
    console.log(`Last Name: ${lastName}`);
    console.log(`Email: ${email}`);
    console.log(`Password: ${password}`);
    
    // You can add logic here to save data to a database or perform other actions.
    
    res.send('Registration successful!');
});

// Start the server
app.listen(port, () => {
    console.log(`Server running on port ${port}`);
});