🔁 1️⃣ class → className

HTML / Bootstrap

Next.js / React

📌 Reason: class JS ka reserved word hai

🔁 2️⃣ for → htmlFor

🔁 3️⃣ onclick → onClick

❌ () nahi lagate (auto run ho jayega)

🔁 4️⃣ Inline CSS string → Object

📌 camelCase + double {}

🔁 5️⃣ style value → camelCase

🔁 6️⃣ checked, selected → boolean

🔁 7️⃣ value → state controlled

🔁 8️⃣ href → Link

🚀 Fast navigation, no reload

🔁 9️⃣ img → Image (recommended)

🔁 🔟 JS directly → useEffect

🔁 1️⃣1️⃣ document / window direct ❌

✅ Correct:

🔁 1️⃣2️⃣ if else HTML ❌ → JSX ternary

🔁 1️⃣3️⃣ Loop (for) → map()

🔁 1️⃣4️⃣ data-* attributes (same)

✅ Bootstrap data attributes same hi rehte hain

🔁 1️⃣5️⃣ Self closing tags

🔁 1️⃣6️⃣ readonly → readOnly

🔁 1️⃣7️⃣ tabindex → tabIndex

🔁 1️⃣8️⃣ Comments

🔁 1️⃣9️⃣ dangerouslySetInnerHTML

⚠️ XSS risk

🔁 2️⃣0️⃣ Bootstrap icons / JS plugins

• CSS → normal import

• JS → useEffect only

🧠 One-look Cheatsheet (exam style)

🧠 Golden line (notes me likh lo)

“HTML jaisa dikhta hai, par JSX JavaScript hai”

The post Bootstrap / HTML → Next.js (React JSX) Differences appeared first on Cody Paste.

🟢 Next.js Specific Hooks (VERY IMPORTANT)

🟡 Special Rendering Files (Next.js Concepts)

🔵 Data & Rendering Concepts (Important)

🟣 Navigation & UI Utilities

🧠 Custom Hook (Advanced but IMPORTANT)

Example:

The post React + Next.js – COMPLETE HOOKS & IMPORTANT CONCEPTS (NOTES) appeared first on Cody Paste.

• XAMPP Control Panel open karo

• MySQL → Start (Running hona chahiye ✅)

phpMyAdmin open:

2️⃣ Database & Table Create

Database:

Sample Table:

👉 Ye table CRUD ke liye use hogi.

3️⃣ DB Config Folder

Path confirm:

Is folder ke andar file banao 👇

📄 src/db/db.js

🧠 CI4 mapping:

4️⃣ DB Connection Test (IMPORTANT)

📄 src/app.js me upar add karo:

⚠️ Path dhyaan se:

5️⃣ Server Restart

Terminal me:

Expected Output:

👉 Matlab:

• Node server running ✅

• MySQL connected ✅

The post NODE.JS + MySQL CONNECTION appeared first on Cody Paste.

Command Prompt / Terminal:

Expected Output:

👉 Agar version aa raha hai → Node & npm installed ✅

2️⃣ Project Folder Location

Node project kahin bhi ho sakta hai (htdocs zaroori nahi)

Example:

Node ko folder location se koi farak nahi padta.

3️⃣ Project Open in VS Code

• VS Code → File → Open Folder

• Select:

• Terminal open:

8️⃣ package.json Scripts Setup

📄 package.json me scripts section:

👉 npm run dev = development mode
👉 npm start = normal mode

9️⃣ Server Run Command

Expected Terminal Output:

🔟 Browser Test

Open browser:

Output:

👉 Matlab:

• Node working ✅

• Express working ✅

• Setup complete ✅

🧠 CI4 → Node Mindset Mapping (Quick)

🎯 Current Status

✔ Node installed
✔ npm working
✔ Project setup
✔ Express server running

🔜 NEXT TOPIC (Future Notes)

• MySQL connection (XAMPP)

• CRUD (GET / POST / PUT / DELETE)

• Admin panel + User website

• JWT login

• E-commerce flow

The post NODE.JS BASIC SETUP – (BEGINNER) appeared first on Cody Paste.

STEP 1:

public function __construct() {        
   $this->encrypter  = \Config\Services::encrypter();       
}

STEP 2: (Encrypt)

$ids = '123'
$id = bin2hex($this->encrypter->encrypt($ids));

STEP 3: (Decrypt)

$id = $this->encrypter->decrypt(hex2bin($id));

In View File

<?php
    $encrypter        = \Config\Services::encrypter();
 ?>

<a href="<?= base_url('customer/order-detail/' . bin2hex($encrypter->encrypt($order['orderid']))) ?>">View Order</a>

The post Encrypt Decrypt in CI4 appeared first on Cody Paste.

Encrypt:

$pwd = password_hash($this->request->getPost('pwd'), PASSWORD_BCRYPT);

Match:

$user = $this->db->table('customer')
                         ->select('id, first_name, last_name, uname, emailid, contact, picture, pwd')  // Email aur password select karo
                         ->where('emailid', $email)
                         ->get()
                         ->getRow();
                         
                    
                    if ($user && password_verify($password, $user->pwd)) {
                        
                        $record = $user;
                        // Password matches, login successful
                        $this->session->set('customerSessData', $record);
                        return redirect()->to('customer/dashboard')->with('success', 'Welcome to Dashboard');
                        // Redirect to dashboard or desired page
                    }

The post Encrypt Password in CI4 appeared first on Cody Paste.

1. Configure Encryption in CI4

Ensure that the encryption service is properly set up. Open the app/Config/Encryption.php file and configure it:

<?php

namespace Config;

use CodeIgniter\Config\BaseConfig;

class Encryption extends BaseConfig
{
    public $key = 'your-encryption-key'; // Replace with a random key
    public $driver = 'OpenSSL';         // Use OpenSSL for encryption
}

Replace your-encryption-key with a strong random key. You can generate one using bin2hex(random_bytes(32)) in PHP.

2. Encrypt the Value

Use CI4’s encrypter() helper to encrypt the value before adding it to the URL:

use CodeIgniter\Encryption\Encryption;

$encrypter = \Config\Services::encrypter();

// The value to encrypt
$data = 'your-value-to-encrypt';

// Encrypt the value
$encryptedValue = base64_encode($encrypter->encrypt($data));

// Pass the encrypted value in the URL
$url = base_url('your-controller/your-method/' . $encryptedValue);

3. Decrypt the Value

Retrieve and decrypt the value in your controller:

public function yourMethod($encryptedValue)
{
    $encrypter = \Config\Services::encrypter();

    // Decode and decrypt the value
    try {
        $decryptedValue = $encrypter->decrypt(base64_decode($encryptedValue));
        echo 'Decrypted Value: ' . $decryptedValue;
    } catch (\Exception $e) {
        // Handle errors (e.g., invalid encryption or tampered data)
        echo 'Decryption failed: ' . $e->getMessage();
    }
}

4. Example Flow

• Encrypt and Generate URL:

  $data = '12345';
  $encryptedValue = base64_encode($encrypter->encrypt($data));
  echo base_url('example/decrypt/' . $encryptedValue);

  
  Decrypt in Controller:

  public function decrypt($encryptedValue)
  {
      $encrypter = \Config\Services::encrypter();
      $decryptedValue = $encrypter->decrypt(base64_decode($encryptedValue));
      echo 'Decrypted Value: ' . $decryptedValue;
  }

  
   

The post Encrypt decrypt in CI4 – CodeIgniter 4 appeared first on Cody Paste.

public function generateCoupon($numCoupons = 32500) {
        // Define allowed characters for alphabet and digits
        $alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
        $digits = '0123456789';
        $alphaLength = strlen($alphabet);
        $digitLength = strlen($digits);

        // Coupon amount distribution
        $amountDistribution = [
            500 => 2000,  // 2000 coupons with amount 500
            200 => 5000,  // 5000 coupons with amount 200
            100 => 7000,  // 7000 coupons with amount 100
            50  => 18500  // 18500 coupons with amount 50
        ];

        // Prepare the data for batch insert
        $insertData = [];
        $couponCount = 0;
        $coupons = [];

        // Loop through each amount distribution
        foreach ($amountDistribution as $amount => $count) {
            for ($i = 0; $i < $count; $i++) {
                // Generate a unique coupon code in the format AAA111
                $couponCode = '';
                while (true) {
                    // First 3 characters: Alphabetical
                    $couponCode = '';
                    for ($j = 0; $j < 3; $j++) {
                        $couponCode .= $alphabet[rand(0, $alphaLength - 1)];
                    }

                    // Last 3 characters: Numeric
                    for ($k = 0; $k < 3; $k++) {
                        $couponCode .= $digits[rand(0, $digitLength - 1)];
                    }

                    // Check if the coupon code is unique
                    if (!in_array($couponCode, $coupons)) {
                        // Add unique coupon to the list and exit while loop
                        $coupons[] = $couponCode;
                        break;
                    }
                }

                // Prepare data for batch insert
                $insertData[] = [
                    'coupon' => $couponCode,
                    'amount' => $amount,
                    'expire_date' => date('Y-m-d'), // Set expire_date to today's date
                    'status' => 1
                ];

                $couponCount++;

                // Optional: Break early for testing purposes
                if ($couponCount >= $numCoupons) {
                    break 2; // Break out of both loops
                }
            }
        }

        // Insert coupons in batches (chunk size of 500 or smaller to avoid memory issues)
        $chunks = array_chunk($insertData, 500);
        foreach ($chunks as $chunk) {
            $this->db->insert_batch('coupon', $chunk); // Insert the current chunk
        }

        echo count($insertData); // Return the number of coupons inserted
    }

The post Random Unique Number in CI3 appeared first on Cody Paste.

1. Created a Helper Function
Created helper functions for password hashing and verification to reuse across your application.

Create a file in app/Helpers, e.g., app/Helpers/password_helper.php

password_helper.php

<?php
    if (!function_exists('hash_password')) {
        function hash_password($password) {
            return password_hash($password, PASSWORD_BCRYPT);
        }
    }
    
    if (!function_exists('verify_password')) {
        function verify_password($input_password, $stored_hash) {
            return password_verify($input_password, $stored_hash);
        }
    }
?>

2. Hash Password During Registration

$password = $this->request->getPost('password');
$hashed_password = hash_password($password);

3. Verify Password During Login

$password = $this->request->getPost('password');
verify_password($input_password, $user->password);

If the password is verified, it will return 1, else blank. e.g. below

if(verify_password($password, $user->password)) {
	// Set session or other login logic
	session()->set(['username' => $user->username]);
	return redirect()->to('/superadmin/dashboard')->with('success', 'Login successful!');
}else {
	return redirect()->back()->with('error', 'Invalid credentials!');
}

The post Hash Password in CI4 appeared first on Cody Paste.

public function login(){
        if(!empty($_POST)){
            
            // Form Validation-->
                $validation =  \Config\Services::validation();
                $validation->setRules([
                    'username' => ['label' => 'Username',  'rules' => 'required'],
                    'password'  => ['label' => 'Password', 'rules' => 'required']
                ]);
            // Form Validation Close-->
            
            if(!$validation->withRequest($this->request)->run()) {
                $validationErrors = $validation->listErrors();
                // Redirect back with validation errors
                return redirect()->back()->with('error', $validationErrors);
            }else{
                $username   = $this->request->getPost('username');
        		$password   = $this->request->getPost('password');
        		
        		$user = $this->db->table('superadmin')->where('username', $username)->get()->getRow();
        		
        		if ($user) {
                    // Verify the password
                    if (verify_password($password, $user->password)) {
                        // Set session or other login logic
                        session()->set(['username' => $user->username]);
                        return redirect()->to('/superadmin/dashboard')->with('success', 'Login successful!');
                    } else {
                        return redirect()->back()->with('error', 'Invalid credentials!');
                    }
                }else {
                    return redirect()->back()->with('error', 'User not found!');
                }
            }
		}
		else{			
            echo view('superadmin/includes/header');
            echo view('superadmin/login');
            echo view('superadmin/includes/footer');           
		}    
    }

Password:

1. Created a Helper Function
created helper functions for password hashing and verification to reuse them across your application.

Create a file in app/Helpers, e.g., app/Helpers/password_helper.php
hash_password($password)

verify_password($input_password, $stored_hash)

Load this helper in your application:

helper('password');

2. Hash Password During Registration

$password = $this->request->getPost('password');
$hashed_password = hash_password($password);

3. Verify Password During Login

$password = $this->request->getPost('password');
verify_password($input_password, $user->password)
If password verify will return 1, else blank.

Redirect (Back to request page):

return redirect()->back()->with('error', 'Invalid credentials!');

Form validation error
if(!$validation->withRequest($this->request)->run()) {
$validationErrors = $validation->listErrors();
// Redirect back with validation errors
return redirect()->back()->with('error', $validationErrors);
}

Model:

Not used

View:

<h1>Login Super Admin</h1>

<?php if (session()->get('error')): ?>
    <div class="alert alert-danger">
        <?= session()->get('error') ?>
    </div>
<?php endif; ?>

<form action="<?php echo base_url(); ?>superadmin/login" method="post">
    <input type="text" name="username">
    <input type="password" name="password">
    <button type="submit">LOGIN</button>
</form>

Password Helper:

app/Helpers/password_helper.php

<?php
    if (!function_exists('hash_password')) {
        function hash_password($password) {
            return password_hash($password, PASSWORD_BCRYPT);
        }
    }
    
    if (!function_exists('verify_password')) {
        function verify_password($input_password, $stored_hash) {
            return password_verify($input_password, $stored_hash);
        }
    }
?>

The post Login in CI4 Complete Code appeared first on Cody Paste.