Forward_Station_Server/api/v1/UpdatePrices/updatePricesData.php

<?php 
    require "connectionDb.php";
// if (isset($_POST['find'])) {
    
// $customers = $db->query("SELECT * FROM price_update JOIN grade_price_update ON price_update.id=grade_price_update.price_update_id");
$customers = $db->query("SELECT * FROM price_update");

$json_data=[];

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

// var_dump($row);
$details = [
"Id" => $row['id'],
"Status" => $row['status'],
"Timing" => $row['timing'],
"Create_At" => dateFormatChanger($row['created_at']),
"Update_At" => dateFormatChanger($row['updated_at']),
// "Grade_Id" => $row['grade_id'],
// "Grade_Text" => $row['grade_text'],
// "Grade_Price" => $row['grade_price'],
// "New_Grade_Price" => $row['new_grade_price'],
];
//here pushing the values in to an array  
array_push($json_data,$details);  
}
$json_data_all = ["data" => $json_data];

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