post value to server from esp32

#include <Arduino.h>
#include <WiFi.h>
#include <HTTPClient.h>
int ph_value = 20;
const char* ssid = "Shoaib";
const char* password = "A01234567890";
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP Address");
  Serial.println(WiFi.localIP());

}


void loop() {
  HTTPClient http;
  http.begin("https://finalyearprojectnuml.000webhostapp.com/fyp.php");
  http.addHeader("Content-Type", "application/x-www-form-urlencoded");
  int httpResponseCode = http.POST(ph_value);
  if (httpResponseCode > 0) {
    String response = http.getString();
    Serial.println(httpResponseCode);
    Serial.println(response);
  }
  else {
    Serial.print("Error on sending post");
    Serial.println(httpResponseCode);
  }
  http.end();
  delay(2000);
}