Sending GPS data to server using ESP8266 nodemcu

gps.php

<?php
    date_default_timezone_set("Asia/Dhaka");
    header_remove('Access-Control-Allow-Origin');
    header('Access-Control-Allow-Origin: *');

    $servername = "";
    $username = "";;
    $password = "";
    $dbname = ""; 

    $conn = new mysqli($servername, $username, $password, $dbname);

    $data = file_get_contents('php://input'); // put the contents of the file into a variable
    $receive = json_decode($data); // decode the JSON feed
    
    // Data Store for Send
    $return = array();
  
    // Connection Check
    if ($conn->connect_error) {
        die("Connection failed: " . $conn->connect_error);
    }

    // Check POST METHOD
	if ($_SERVER["REQUEST_METHOD"] == 'POST')
	{   
        
        $id = base64_encode(rand(10,100));

        
        // Data Receive 
        $a  = $receive->lat;
        $b  = $receive->lng;
        $c  = $receive->coin;
       

        // mysql Store qry
        $sql_sp = "INSERT INTO gsm(lat, lng, msg, created, time) VALUES ('". $a ."','". $b ."','". $c ."',  CURRENT_DATE(), CURRENT_TIME())";

        if ($conn->query($sql_sp) === TRUE) 
        {
            // send response
            echo 200;
        }
              
        // JSON Encoding to send 
        }else{
             echo "Problem";
        }

  
    $conn->close();
?>

gpswithesp.ino

#include <ESP8266HTTPClient.h>
#include <ESP8266WiFi.h>
#include <TinyGPS.h>
#include <SoftwareSerial.h>

TinyGPS gps;
SoftwareSerial ss(0, 2);

int big = 14;
int small = 12;
float flat, flon;

void setup() {
 
  Serial.begin(115200);                                  //Serial connection
  ss.begin(9600);

  pinMode(big, INPUT);
  pinMode(small, INPUT);
  
  WiFi.begin("EEE", "weakpassword");   //WiFi connection
 
  while (WiFi.status() != WL_CONNECTED) {  //Wait for the WiFI connection completion
 
    delay(500);
    Serial.println("Waiting for connection");
 
  }
 Serial.println("Wifi Connected");
  
}

void loop(){
 // server(flat, flon, "Big");
 if (digitalRead(big))
  {
    Serial.println("Big Coin Detect");
    gpsfunc();
    server(flat, flon, "Big Coin");
  }

  if (digitalRead(small))
  {
    Serial.println("Small Coin Detect");
    gpsfunc();
    server(flat, flon, "Small Coin");
  }
}

void gpsfunc(){
  Serial.println("GPS Detect");
  unsigned long chars;
  unsigned short sentences, failed;
  
  // For one second we parse GPS data and report some key values
  for (int c = 0; c <= 30; c++)
  {
    while (ss.available())
    {
      char c = ss.read();
      // Serial.write(c); // uncomment this line if you want to see the GPS data flowing
      if (gps.encode(c)) // Did a new valid sentence come in?
      {
        Serial.println("New Data Found");
        unsigned long age;
        gps.f_get_position(&flat, &flon, &age);
        Serial.print("LAT=");
        Serial.print(flat == TinyGPS::GPS_INVALID_F_ANGLE ? 0.0 : flat, 6);
        Serial.print(" LON=");
        Serial.print(flon == TinyGPS::GPS_INVALID_F_ANGLE ? 0.0 : flon, 6);
        Serial.print(" SAT=");
        Serial.print(gps.satellites() == TinyGPS::GPS_INVALID_SATELLITES ? 0 : gps.satellites());
        Serial.print(" PREC=");
        Serial.print(gps.hdop() == TinyGPS::GPS_INVALID_HDOP ? 0 : gps.hdop());
      }
    }
  }
  Serial.println("GPS Detect Finish");
  
}
 
void server(float lat, float lng, String msg) {
  Serial.println("Sending Data To Server");
  
  String s = "\"";
  String b = "{\"lat\":";
  String bV = String(lat, 6);
  String c = ",\"lng\":";
  String cV = String(lng, 6);
  String d = ",\"coin\":";
  String dV = msg;
  String e = "\"}";
  String url = b + s + bV + s + c + s + cV +  s + d + s + dV  + e;

  
 if(WiFi.status()== WL_CONNECTED){   //Check WiFi connection status
 
   HTTPClient http;    //Declare object of class HTTPClient
 
   http.begin("http://stupidarnob.com/phpAPI/gsm.php");      //Specify request destination
   http.addHeader("Content-Type", "text/plain");  //Specify content-type header
 
   int httpCode = http.POST(url);   //Send the request
   String payload = http.getString();                  //Get the response payload
 
   Serial.println(httpCode);   //Print HTTP return code
   Serial.println(payload);    //Print request response payload
 
   http.end();  //Close connection
 
 }else{
 
    Serial.println("Error in WiFi connection");   
 
 }
 
  delay(10000);  //Send a request every 30 seconds
 
}