A helper class to assist in exporting data to csv file.

csv_helper.php

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

// ------------------------------------------------------------------------

/**
 * CSV Helpers
 * Inspiration from PHP Cookbook by David Sklar and Adam Trachtenberg
 * 
 * @author        Jérôme Jaglale
 * @link        http://maestric.com/en/doc/php/codeigniter_csv
 */

// ------------------------------------------------------------------------


//-------------------------------------------
/*
Documentation:
==============
1. Array to csv file
  array_to_csv($ArrayVariable,'file.csv')
  
2. Query to csv file
  echo query_to_csv($query,'stalls.csv');
  $query = $this->db->get('stall_contact');
  $this->load->helper('csv');
  
3. Query to download file
  $query = $this->db->get('stall_contact');
  $this->load->helper('csv');
  query_to_csv($query,TRUE,'bookings.csv');
*/
if ( ! function_exists('array_to_csv'))
{
    function array_to_csv($array, $download = "")
    {
        if ($download != "")
        {    
            header('Content-Type: application/csv');
            header('Content-Disposition: attachement; filename="' . $download . '"');
        }        

        ob_start();
        $f = fopen('php://output', 'w') or show_error("Can't open php://output");
        $n = 0;        
        foreach ($array as $line)
        {
            $n++;
            if ( ! fputcsv($f, $line))
            {
                show_error("Can't write line $n: $line");
            }
        }
        fclose($f) or show_error("Can't close php://output");
        $str = ob_get_contents();
        ob_end_clean();

        if ($download == "")
        {
            return $str;    
        }
        else
        {    
            echo $str;
        }        
    }
}

// ------------------------------------------------------------------------

/**
 * Query to CSV
 *
 * download == "" -> return CSV string
 * download == "toto.csv" -> download file toto.csv
 */
if ( ! function_exists('query_to_csv'))
{
    function query_to_csv($query, $headers = TRUE, $download = "")
    {
        if ( ! is_object($query) OR ! method_exists($query, 'list_fields'))
        {
            show_error('invalid query');
        }
        
        $array = array();
        
        if ($headers)
        {
            $line = array();
            foreach ($query->list_fields() as $name)
            {
                $line[] = $name;
            }
            $array[] = $line;
        }
        
        foreach ($query->result_array() as $row)
        {
            $line = array();
            foreach ($row as $item)
            {
                $line[] = $item;
            }
            $array[] = $line;
        }

        echo array_to_csv($array, $download);
    }
}

/* End of file csv_helper.php */
/* Location: ./system/helpers/csv_helper.php */