Escaping php '#' comment symbol in mysql database when exporting to csv - php

Question

I have a php script that exports a mysql database table to a csv file. For one of the fields of data, a user included an octothorp # in their text. For example, My Idea #1.
When my code gets to this piece of data, it stops at the # symbol. I'm guessing it hits the # and believes everything else that follows is a comment.
As a temporary solution, I am stripping out this symbol when adding the data to the database, but this is not ideal. Given the script below, how might I escape this symbol to prevent this from happening?
$query = "SELECT * FROM my_table";
$result = #mysqli_query($dbc, $query);
if (!$result) {
die('Couldn\'t fetch records');
}
$num_fields = mysqli_num_fields($result);
$headers = [];
for ($i = 0; $i < $num_fields; $i++) {
$field = mysqli_fetch_field_direct($result, $i);
// var_dump($field);
$headers[] = $field->name;
}
$fp = fopen('php://output', 'w');
if ($fp && $result) {
header('Content-Type: text/csv');
header('Content-Disposition: attachment; filename="export.csv"');
header('Pragma: no-cache');
header('Expires: 0');
fputcsv($fp, $headers);
while ($row = mysqli_fetch_array($result, MYSQLI_NUM)) {
fputcsv($fp, array_values($row));
}
die;
}