CodeIgniter: Export data from database into excel and download - php

Question

I'm working on a project, that requires exporting data from MYSQL DB depending on the multiple conditions. I am referring this:
This is my source code:
public function exportExcelData($records)
{
$heading = false;
if (!empty($records))
foreach ($records as $row) {
if (!$heading) {
// display field/column names as a first row
echo implode("\t", array_keys($row)) . "\n";
$heading = true;
}
echo implode("\t", ($row)) . "\n";
}
}
public function fetchDataFromTable()
{
$query =$this->db->get('one_piece_characters'); // fetch Data from table
$allData = $query->result_array(); // this will return all data into array
$dataToExports = [];
foreach ($allData as $data) {
$arrangeData['Charater Name'] = $data['name'];
$arrangeData['Charater Profile'] = $data['profile'];
$arrangeData['Charater Desc'] = $data['description'];
$dataToExports[] = $arrangeData;
}
// set header
$filename = "dataToExport.xls";
header("Content-Type: application/vnd.ms-excel");
header("Content-Disposition: attachment; filename=\"$filename\"");
$this->exportExcelData($dataToExports);
}
If I use it without any where clause, it is giving entire table.
If i use only single where clause, it works good.
Bur, if I use multiple where conditions. it gives me a blank excel sheet.
Does anyone have any idea regarding how to make it work with multiple where conditions?

Answer 1

Try using this code on your model file:
function createcsv(){
$this->load->dbutil();
$this->load->helper('file');
$this->load->helper('download');
$delimiter = ",";
$newline = "\r\n";
$filename = "filename.csv";
$query = "SELECT * FROM YourTable"; //USE HERE YOUR QUERY
$result = $this->db->query($query);
$data = $this->dbutil->csv_from_result($result, $delimiter, $newline);
force_download($filename, $data);
}

Answer 2

// ecport contect list in csv ,
public function cnt_explode(){
$csvData[] =array( "Name", "Email Id","Mobile No.","Event", "City","location","No of guest","Event Date","Budget",
"Venue Type","Food","Drink","Description","Date");
$data = $this->contact_model->get_contact(NULL);
foreach($data as $cnt){
$csvData[]=array(
$cnt->name ,$cnt->email, $cnt->mobile_no, $cnt->event, $cnt->city, $cnt->location, $cnt->no_guest,$cnt->event_date,$cnt->budget, $cnt->venue_type,
$cnt->food, $cnt->drink, $cnt->description,$cnt->created_on,
);
}
header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Content-Type: application/force-download");
header("Content-Type: application/octet-stream");
header("Content-Type: application/download");
header("Content-Disposition: attachment;filename=venuexpo_".time().".csv");
header("Content-Transfer-Encoding: binary");
$df = fopen("php://output", 'w');
array_walk($csvData, function($row) use ($df) {
fputcsv($df, $row);
});
fclose($df);
}
///------------ downlode csv done --------------