Fetch File from database to display in datatable in php

hi,
i have this code i am using this mathod without file is fech record but if i want to fetch file that is not working

## Fetch records
$empQuery = "select * from cmt_attachment WHERE 1 ".$searchQuery." order by ".$columnName." ".$columnSortOrder." limit ".$row.",".$rowperpage;
$empRecords = mysqli_query($con, $empQuery);
$data = array();

while ($row = mysqli_fetch_assoc($empRecords)) {


$data[] = array(
"date"=>$row['date'],
"user"=>$row['user'],
"r_total"=>$row['r_total'],
"<a href='admin/mt-reportfile/"'r_atach'=>$row['r_atach']" '><i class='fas fa-hourglass-half'></i></a>",
"w_total"=>$row['w_total']