database rows polling service - php

Question

I intend to develop lots of client voting systems capturing the following:
<?php
$data = array(
'vancancy' => 'PE',
'pollingStation' => 'PS1001',
'validVotes' => '400',
'rejectedVotes' => '10',
'validVotes' => '400',
'base64Image' => 'VVVGGFTFTFHNBFVUWWSETD',
'candidate 1' => '200',
'candidate 2' => '100',
'candidate 3' => '190',
'base64Image' => 'VVVGGFTFTFHNBFVUWWSETD');
$payload = json_encode($data);
$url = 'http://localhost/APIS/RMS/jsonapi.php';
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-
Type:application/json'));
$response = curl_exec($ch);
echo $response;
curl_close($ch);
?>
At the central server where the posting is done; i have STAGING database table that receives the json data and keeps it as TEXT.
I want a SERVICE that should regularly poll the STAGING table and split the json TEXT into separate fields to populate in another resulting table (storing candidate 1, 2, 3 and the amount of votes. After each row is read, then a flag in staging table must be set so I read it again. At the results table I must calculate how many votes each candidate has in another total votes.
########### THis is the API code receiving results from clients########
<?php
header("Content-Type:application/json");
require 'checkSQLInsertion.php';
// read the incoming POST body (the JSON)
$input = file_get_contents('php://input');
if($input)
{
$SQLInsertStatus=get_insertStatus($input);
if($SQLInsertStatus)
{
response(200,1);//No SQL Insertion
}
else
{
response(200,0); //Successful SQL Insetion
}
}
else
{
response(400,"If you can see this, then Web Service is Working, try
again!! ");
}
function response($status,$ack)
{
header("HTTP/1.1 ".$status);
$response['status']=$status;
$response['status_message']=$ack;
$json_response = json_encode($response);
echo $json_response;
}