markdown PHP_export_csv

Posted 2021-05-06

<?php
//  https://stackoverflow.com/questions/38910297/how-to-export-array-to-csv-in-codeigniter
defined('BASEPATH') OR exit('No direct script access allowed');

class Import extends CI_Controller {

        public function __construct() {
            parent::__construct();
        }
        public function exports_data(){
            $data[] = array('x'=> $x, 'y'=> $y, 'z'=> $z, 'a'=> $a);
             header("Content-type: application/csv");
            header("Content-Disposition: attachment; filename=\"test".".csv\"");
            header("Pragma: no-cache");
            header("Expires: 0");

            $handle = fopen('php://output', 'w');

            foreach ($data as $data) {
                fputcsv($handle, $data);
            }
                fclose($handle);
            exit;
        }
}

From:  https://stackoverflow.com/questions/3933668/convert-array-into-csv

```php
<?
    $data = array(
        array( 'row_1_col_1', 'row_1_col_2', 'row_1_col_3' ),
        array( 'row_2_col_1', 'row_2_col_2', 'row_2_col_3' ),
        array( 'row_3_col_1', 'row_3_col_2', 'row_3_col_3' ),
    );
?>
```
We define our function:
```php
<?
    function outputCSV($data) {
        $outputBuffer = fopen("php://output", 'w');
        foreach($data as $val) {
            fputcsv($outputBuffer, $val);
        }
        fclose($outputBuffer);
    }
?>
```
Then we output our data as a CSV:
```php
<?
    $filename = "example";

    header("Content-type: text/csv");
    header("Content-Disposition: attachment; filename={$filename}.csv");
    header("Pragma: no-cache");
    header("Expires: 0");

    outputCSV($data);
?>
```