Forward_Station_Server/api/v1/Customers/customersVw.php

<?php 
    require "connectionDb.php";

    $customers = $db->query("SELECT * FROM customer");

$json_data=[];

while ($row = $customers->fetchArray()) {

    //print_r($row);

$details = [
"Customer_Id" => $row['id'],
"Name" => $row['name'],
"Credit_Sale" => ($row['credit_sale']==1)?"Yes":"No",
];
//here pushing the values in to an array  
array_push($json_data,$details);  
}
$json_data_all = ["data" => $json_data];

$myfile = fopen("api/v1/Customers/customers.txt", "w+") or die("Unable to open file!");;
fwrite($myfile,json_encode($json_data_all, JSON_PRETTY_PRINT));
fclose($myfile);
 ?>