Export MySQL data to CSV file in CodeIgniter 3

CSV (Comma Separated Values ) is the most popular file format for data import and export within the project.

In PHP for creating CSV file, you can either use fputcsv() method or directly write the comma-separated content on the file.

In this tutorial, I will show you how you can export MySQL data in CSV file format in your CodeIgniter 3 project.

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Contents

1. Table structure
2. Configuration
3. Model
4. Controller
5. View
6. Demo
7. Conclusion

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1. Table structure

I am using users table in the example and added some data.

CREATE TABLE `users` (
  `id` int(11) NOT NULL PRIMARY KEY AUTO_INCREMENT,
  `username` varchar(60) NOT NULL,
  `name` varchar(50) NOT NULL,
  `gender` varchar(10) NOT NULL,
  `email` varchar(60) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

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2. Configuration

Navigate to application/config/database.php and define Database connection.

$db['default'] = array(
 'dsn' => '',
 'hostname' => 'localhost',
 'username' => 'root', // Username
 'password' => '', // Password
 'database' => 'tutorial', // Database name
 'dbdriver' => 'mysqli',
 'dbprefix' => '',
 'pconnect' => FALSE,
 'db_debug' => (ENVIRONMENT !== 'production'),
 'cache_on' => FALSE,
 'cachedir' => '',
 'char_set' => 'utf8',
 'dbcollat' => 'utf8_general_ci',
 'swap_pre' => '',
 'encrypt' => FALSE,
 'compress' => FALSE,
 'stricton' => FALSE,
 'failover' => array(),
 'save_queries' => TRUE
);

Default controller

Open application/config/routes.php and edit default_controller value to User.

$route['default_controller'] = 'Users';

Load Database

To access the MySQL database require loading database library.

Open application/config/autoload.php and add the database in libraries array().

$autoload['libraries'] = array("database");

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3. Model

Create a new Main_Model.php file in application/models/ folder.

Create a single method getUserDetails() for records select from users table and return an Array.

Completed Code

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Main_model extends CI_Model {

  function getUserDetails(){
 
    $response = array();
 
    // Select record
    $this->db->select('username,name,gender,email');
    $q = $this->db->get('users');
    $response = $q->result_array();
 
    return $response;
  }

}

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4. Controller

Create a new Users.php file in application/controller/ folder.

Defined 3 methods –

• __constuct() – Load url helper and Main_model model.
• index() – Fetch data by calling getUsersDetails() method and pass in $this->load->view('users_view',$data);
• exportCSV() – Using this method for export data.

Set the filename and header requests. Select records by calling getUserDetails() method and create a file variable.

Loop on the fetched records and write data in $file variable using fputcsv() method.

Completed Code

<?phpdefined('BASEPATH') OR exit('No direct script access allowed');
class Users extends CI_Controller {
  public function __construct(){
   parent::__construct();
   
   // load base_url 
   $this->load->helper('url');
   
   // Load Model 
   $this->load->model('Main_model'); 
  } 

  public function index(){
   // get data $data = array(); 
   $data['usersData'] = $this->Main_model->getUserDetails();
  
   // load view 
   $this->load->view('users_view',$data); 
  }
 
  // Export data in CSV format 
  public function exportCSV(){ 
   // file name 
   $filename = 'users_'.date('Ymd').'.csv'; 
   header("Content-Description: File Transfer"); 
   header("Content-Disposition: attachment; filename=$filename"); 
   header("Content-Type: application/csv; ");
   
   // get data 
   $usersData = $this->Main_model->getUserDetails();

   // file creation 
   $file = fopen('php://output', 'w');
 
   $header = array("Username","Name","Gender","Email"); 
   fputcsv($file, $header);
   foreach ($usersData as $key=>$line){ 
     fputcsv($file,$line); 
   }
   fclose($file); 
   exit; 
  }
}

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5. View

Create a new users_view.php file in application/views/ folder.

List user data in <table> by looping on $usersData array variable and create a <a href='<?= base_url() ?>index.php/users/exportCSV'>Export</a> element for an export link.

Completed Code

<?php

defined('BASEPATH') OR exit('No direct script access allowed');
?>
<!DOCTYPE html>
<html lang="en">
 <head> 
   <meta charset="utf-8"> 
   <title>Export MySQL data to CSV file in CodeIgniter 3</title>
 </head>
 <body>
   <!-- Export Data --> 
   <a href='<?= base_url() ?>index.php/users/exportCSV'>Export</a><br><br>

   <!-- User Records --> 
   <table border='1' style='border-collapse: collapse;'> 
     <thead> 
      <tr> 
       <th>Username</th> 
       <th>Name</th> 
       <th>Gender</th> 
       <th>Email</th> 
      </tr> 
     </thead> 
     <tbody> 
     <?php
     foreach($usersData as $key=>$val){ 
       echo "<tr>"; 
       echo "<td>".$val['username']."</td>"; 
       echo "<td>".$val['name']."</td>"; 
       echo "<td>".$val['gender']."</td>"; 
       echo "<td>".$val['email']."</td>"; 
       echo "</tr>"; 
      } 
      ?> 
     </tbody> 
    </table>
  </body>
</html>

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6. Demo

View Demo

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7. Conclusion

In the example, I created a method for the data export in CSV format and pointed the Export link to the controller method. I used fputcsv() method to write data to the file.

You can view the CodeIgniter 4 version of this tutorial here.

View this tutorial, If you want to know CSV file data import in CodeIgniter 3.

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