Course Content
Introduction to CodeIgniter 4
CodeIgniter is an Application Development Framework. CodeIgniter is a popular and powerful MVC (Model-View-Controller) framework that is used to develop web applications. It is a free and Open-source PHP framework.
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MVC (Model-View-Controller)
MVC stands for Model-View-Controller. MVC is an application design model consisting of three interconnected parts. They include the model (data), the view (user interface), and the controller (processes that handle input).
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Sessions
The Session class allows you to maintain a user’s "state" and track their activity while they browse your site.
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URI Routing
There is a one-to-one relationship between a URL string and its corresponding controller class/method.
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Working with Database
Like any other framework, we need to interact with the database very often and CodeIgniter makes this job easy for us. It provides a rich set of functionalities to interact with the database.
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Spreadsheet
PhpSpreadsheet is a PHP library for reading and writing spreadsheet files. Importing Excel and CSV into MySQL help to save the user time and avoid repetitive work.
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CodeIgniter 4
About Lesson

PhpSpreadsheet is a PHP library for reading and writing spreadsheet files. Importing Excel and CSV into MySQL helps to save the user time and avoid repetitive work.

 

Software requirements

PHP version 7.2 or newer to develop using PhpSpreadsheet. Other requirements, such as PHP extensions, are enforced by the composer.

 

Installation

  1. Download and install CodeIgniter.
  2. Use Composer to install PhpSpreadsheet into your project:
    composer require phpoffice/phpspreadsheet
  3. Use phpspreadsheet the library inside your controller

 

Create MySQL Database and Table

The following SQL query creates a user_info the table in the MySQL database.

CREATE TABLE `client_info` (
  `id` int(10) NOT NULL PRIMARY KEY AUTO_INCREMENT,
  `name` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `country_code` varchar(10) COLLATE utf8mb4_unicode_ci NOT NULL,
  `mobile` varchar(100) COLLATE utf8mb4_unicode_ci NOT NULL,
  `email` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `city` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `ip_address` varchar(100) COLLATE utf8mb4_unicode_ci NOT NULL,
  `created_at` datetime NOT NULL,
  `updated_at` timestamp NOT NULL DEFAULT current_timestamp() ON UPDATE current_timestamp(),
  `status` int(10) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

 

Create Routes

Open App/Config/Routes.php file and add the following lines.

<?php 

$routes->get('/', 'User::index');
$routes->get('/display', 'User::display');
$routes->post('user/import', 'User::import');
?>

 

Create Model

Create a model file named UserModel.php inside the App/Models folder.

<?php namespace AppModels;

use CodeIgniterModel;
use CodeIgniterDatabase\ConnectionInterface;

class UserModel extends Model {

    protected $db;
    public function __construct(ConnectionInterface &$db) {
        $this->db =& $db;
        $this->table_name = 'user_info';
    }

    public function addUser($data) {
        $this->db
                        ->table($this->table_name)
                        ->insert($data);
        return $this->db->insertID();
    }

    public function getUserList() {
        return $this->db
                        ->table($this->table_name)
                        ->get()
                        ->getResult();
    }

    public function getUser($where) {
        return $this->db
                        ->table($this->table_name)
                        ->where($where)
                        ->get()
                        ->getRow();
    }

    public function updateUser($where, $data) {
        return $this->db
                        ->table($this->table_name)
                        ->where($where)
                        ->set($data)
                        ->update();
    }

    public function deleteUser($where) {
        return $this->db
                        ->table($this->table_name)
                        ->where($where)
                        ->delete();
    }

    public function bulkInsert($data) {
        return $this->db
                        ->table($this->table_name)
                        ->insertBatch($data);
    }
}

 

Create Controller and load class

Create a controller named User.php and use the PHPSpreadsheet library inside the controller. See the following code for the controller.

<?php 
namespace AppControllers;

use AppControllersBaseController;
use AppModelsUserModel;

use PhpOfficePhpSpreadsheetSpreadsheet;
use PhpOfficePhpSpreadsheetWriterXlsx;

class User extends BaseController {

    public function __construct() {
        $db                         = db_connect();
        $this->userModel             = new UserModel($db);

        $this->ip_address            = $_SERVER['REMOTE_ADDR'];
        $this->datetime          = date("Y-m-d H:i:s");
    }

    public function index() {
        echo view("index");
    }

    public function display() {
        $data   = [];
        $data ["result"] = $this->userModel->getUserList();
        echo view("display", $data);
    }

    public function import() {
        $path           = 'documents/users/';
        $json           = [];
        $file_name      = $this->request->getFile('file');
        $file_name      = $this->uploadFile($path, $file_name);
        $arr_file       = explode('.', $file_name);
        $extension      = end($arr_file);
        if('csv' == $extension) {
            $reader     = new PhpOfficePhpSpreadsheetReaderCsv();
        } else {
            $reader     = new PhpOfficePhpSpreadsheetReaderXlsx();
        }
        $spreadsheet    = $reader->load($file_name);
        $sheet_data     = $spreadsheet->getActiveSheet()->toArray();

        $list           = [];
        foreach($sheet_data as $key => $val) {
            if($key != 0) {
                $result     = $this->userModel->getUser(["country_code" => $val[2], "mobile" => $val[3]]);
                if($result) {
                } else {
                    $list [] = [
                        'name'                  => $val[0],
                        'country_code'          => $val[1],
                        'mobile'                => $val[2],
                        'email'                 => $val[3],
                        'city'                  => $val[4],
                        'ip_address'            => $this->ip_address,
                        'created_at'            => $this->datetime,
                        'status'                => "1",
                    ];
                }
            }
        }

        if(file_exists($file_name))
            unlink($file_name);
        if(count($list) > 0) {
            $result     = $this->userModel->bulkInsert($list);
            if($result) {
                $json = [
                    'success_message'   => showSuccessMessage("All Entries are imported successfully."),
                ];
            } else {
                $json = [
                    'error_message'     => showErrorMessage("Something went wrong. Please try again.")
                ];
            }
        } else {
            $json = [
                'error_message' => showErrorMessage("No new record is found."),
            ];
        }

        echo json_encode($json);
    }

    public function uploadFile($path, $image) {
        if (!is_dir($path)) 
            mkdir($path, 0777, TRUE);
        if ($image->isValid() && ! $image->hasMoved()) {
            $newName = $image->getRandomName();
            $image->move('./'.$path, $newName);
            return $path.$image->getName();
        }
        return "";
    }
}

 

Create View – index.php

Create a view named index.php inside the App/Views directory. See the following code for the view file.

<section class="content">
    <div class="card">
        <div class="card-header">
            <h3 class="card-title">Upload</h3>
        </div>
        <div class="card-body">
            <form id="form-upload-user" method="post" autocomplete="off">
                <div class="sub-result"></div>
                <div class="form-group">
                    <label class="control-label">Choose File <small class="text-danger">*</small></label>
                    <input type="file" class="form-control form-control-sm" id="file" name="file" 
                    accept=".csv, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet,
                    application/vnd.ms-excel" required>
                    <small class="text-danger">Upload excel or csv file only.</small>
                    </div>
                <div class="form-group">
                    <div class="text-center">
                        <div class="user-loader" style="display: none; ">
                            <i class="fa fa-spinner fa-spin"></i> <small>Please wait ...</small>
                        </div>
                    </div>
                </div>
                <div class="form-group">
                    <button type="submit" class="btn btn-primary" id="btnUpload">Upload</button>
                </div>
            </form>
        </div>
    </div>
</section>

<script>
    $(document).ready(function() {
        $("body").on("submit", "#form-upload-user", function(e) {
            e.preventDefault();
            var data = new FormData(this);
            $.ajax({
                type: 'POST',
                url: "<?php echo base_url('user/import') ?>",
                data: data,
                dataType: 'json',
                contentType: false,
                cache: false,
                processData:false,
                beforeSend: function() {
                    $("#btnUpload").prop('disabled', true);
                    $(".user-loader").show();
                }, 
                success: function(result) {
                    $("#btnUpload").prop('disabled', false);
                    if($.isEmptyObject(result.error_message)) {
                        $(".result").html(result.success_message);
                    } else {
                        $(".sub-result").html(result.error_message);
                    }
                    $(".user-loader").hide();
                }
            });
        });
    });
</script>

 

Create View – display.php

Create a view named display.php inside the App/Views directory. See the following code for the view file.

<section class="content">
    <div class="card">
        <div class="card-header">
            <h3 class="card-title">Dipslay</h3>
            <div class="card-tools">
            </div>
        </div>
        <div class="card-body">
            <table class="table table-sm table-bordered table-striped table-hover" width="100%">
                <thead>
                    <tr>
                        <th>No.</th>
                        <th>Name</th>
                        <th>Mobile</th>
                        <th>Email</th>
                        <th>City</th>
                    </tr>
                </thead>
                <tbody>
                <?php 
                $i = 0;
                foreach($result as $row) { 
                ?>    
                    <tr>
                        <td><?php ++$i; ?></td>
                        <td><?php echo $row->name; ?></td>
                        <td><?php echo $row->country_code.$row->mobile; ?></td>
                        <td><?php echo $row->email; ?></td>
                        <td><?php echo $row->city; ?></td>
                    </tr>
                <?php } ?>
                </tbody>
            </table>
        </div>
    </div>
</section>