Export to CSV not same as table PHP - php

Question

I am trying to download table data into a CSV format. The data in one of the fields contains ",".
Eg: Doe, John
When I download the csv file, the data after comma is shifted to next column. But I want the entire data i.e including comma in same column.
The Code I used as follows:
<?php
include('dbconfig.php');
//header to give the order to the browser
header('Content-Type: text/csv');
header('Content-Disposition: attachment;filename=download.csv');
//select table to export the data
$sql ="SELECT * FROM tablename";
$select_table=mysqli_query($db, $sql);
$rows = mysqli_fetch_assoc($select_table);
if ($rows)
{
getcsv(array_keys($rows));
}
while($rows)
{
getcsv($rows);
$rows = mysqli_fetch_assoc($select_table);
}
// get total number of fields present in the database
function getcsv($no_of_field_names)
{
$separate = '';
// do the action for all field names as field name
foreach ($no_of_field_names as $field_name)
{
if (preg_match('/\\r|\\n|,|"/', $field_name))
{
$field_name = '' . str_replace('<em>', '', $field_name) . '';
}
echo $separate . $field_name;
//sepearte with the comma
$separate = ',';
}
//make new row and line
echo "\r\n";
}
?>
Can someone help me get through this issue.
Thanks

Answer 1

Make sure you escape the ,. Typically values that contain sensitive characters (such as , and \n) are surrounded in ".
So your output can be:
"Doe, John",52,New York
You can either write your own escape function or use PHPs fputcsv. It writes to a file handler that's a bit inconvenient but you can make it stdout.
$handle = fopen("php://stdout");
fputcsv($handle, array("Doe, John", 52, "New York"));