+----+---------+
| ID |  File   |
+----+---------+
| 01 | abc.jpg |
| 02 | cde.mp3 |
| 03 | efg.doc |
+----+---------+

$sql = "SELECT id,file FROM `test’ ”;
 if($stmt=$conn->prepare($sql)){
 $stmt->execute();
 $stmt->bind_result($id, $file);
 $array= array();
 while ($stmt->fetch()) {
 $array[]= array('id' =>$id ,’path'=>'http:// abc.com/file/'.$file);
 }
 $json=json_encode($array,JSON_UNESCAPED_UNICODE);
 }
 print_r($json);
 }
 else {
 };

[{"id": "01", "path": "http:// abc.com/file/abc.jpg"},
{"id": "02", "path": "http:// abc.com/file/cde.mp3"},
{"id": "03", "path": "http:// abc.com/file/efg.doc"}]

res.json({"Error" : false, "Message" : "Success", "Users" : rows}