Sử dụng PHPExcel trong CodeIgniter 29 thg 12, 2018

1.Download PHPExcel https://github.com/PHPOffice/PHPExcel)

2.Unzip or extract the downloaded PHPExcel lib files and copy Class directory inside files to application/third-party directory(folder).

3.Now create one file called EXcel.php in application/library folder [application/library/Excel.php]. Then include PHPExcel Class to it. see how I did it below

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

require_once APPPATH."/third_party/PHPExcel.php"; class Excel extends PHPExcel { public function __construct() { parent::__construct(); }}

How to read excel file

$file = './files/test.xlsx';

//load the excel library

$this->load->library('excel');

//read file from path

$objPHPExcel = PHPExcel_IOFactory::load($file);

//get only the Cell Collection

$cell_collection = $objPHPExcel->getActiveSheet()->getCellCollection();

//extract to a PHP readable array format

foreach ($cell_collection as $cell) {

$column = $objPHPExcel->getActiveSheet()->getCell($cell)->getColumn();

$row = $objPHPExcel->getActiveSheet()->getCell($cell)->getRow();

$data_value = $objPHPExcel->getActiveSheet()->getCell($cell)->getValue();

//The header will/should be in row 1 only. of course, this can be modified to suit your need.

if ($row == 1) {

$header[$row][$column] = $data_value;

} else {

$arr_data[$row][$column] = $data_value;

}

}

//send the data in an array format

$data['header'] = $header;

$data['values'] = $arr_data;
How to Create excel file on the file

//load our new PHPExcel library

$this->load->library('excel');

//activate worksheet number 1

$this->excel->setActiveSheetIndex(0);

//name the worksheet

$this->excel->getActiveSheet()->setTitle('test worksheet');

//set cell A1 content with some text

$this->excel->getActiveSheet()->setCellValue('A1', 'This is just some text value');

//change the font size

$this->excel->getActiveSheet()->getStyle('A1')->getFont()->setSize(20);

//make the font become bold

$this->excel->getActiveSheet()->getStyle('A1')->getFont()->setBold(true);

//merge cell A1 until D1

$this->excel->getActiveSheet()->mergeCells('A1:D1');

//set aligment to center for that merged cell (A1 to D1)

$this->excel->getActiveSheet()->getStyle('A1')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);

$filename='just_some_random_name.xls'; //save our workbook as this file name


header('Content-Type: application/vnd.ms-excel'); //mime type


header('Content-Disposition: attachment;filename="'.$filename.'"'); //tell browser what's the file name


header('Cache-Control: max-age=0'); //no cache





//save it to Excel5 format (excel 2003 .XLS file), change this to 'Excel2007' (and adjust the filename extension, also the header mime type)


//if you want to save it as .XLSX Excel 2007 format


$objWriter = PHPExcel_IOFactory::createWriter($this->excel, 'Excel5');


//force user to download the Excel file without writing it to server's HD


$objWriter->save('php://output');
How to Generate Excel file with Database table data


//load our new PHPExcel library


$this->load->library('excel');


//activate worksheet number 1


$this->excel->setActiveSheetIndex(0);


//name the worksheet


$this->excel->getActiveSheet()->setTitle('Users list');





// load database


$this->load->database();





// load model


$this->load->model('userModel');





// get all users in array formate


$users = $this->userModel->get_users();





// read data to active sheet


$this->excel->getActiveSheet()->fromArray($users);





$filename='just_some_random_name.xls'; //save our workbook as this file name





header('Content-Type: application/vnd.ms-excel'); //mime type





header('Content-Disposition: attachment;filename="'.$filename.'"'); //tell browser what's the file name





header('Cache-Control: max-age=0'); //no cache





//save it to Excel5 format (excel 2003 .XLS file), change this to 'Excel2007' (and adjust the filename extension, also the header mime type)


//if you want to save it as.XLSX Excel 2007 format





$objWriter = PHPExcel_IOFactory::createWriter($this->excel, 'Excel5');





//force user to download the Excel file without writing it to server's HD


$objWriter->save('php://output');

nguồn: https://arjunphp.com/how-to-use-phpexcel-with-codeigniter/

Code backup database trong CodeIgniter 9 thg 10, 2018

Trong CodeIgniter để backup database ta sử dụng những hàm sau:

// Load the DB utility class
$this->load->dbutil();

// Backup your entire database and assign it to a variable
$backup = $this->dbutil->backup();

// Load the file helper and write the file to your server
$this->load->helper('file');
write_file('/path/to/mybackup.gz', $backup);

// Load the download helper and send the file to your desktop
$this->load->helper('download');
force_download('mybackup.gz', $backup);