mysqli_query() giving no response, even mysqli_error() giving no error message

Question

I am trying to insert data into mysqli database. Connection to database established successfully. But data is not inserted.Even mysqli_eror() not showing any error.

My code:

<?php

  $name=$_POST['name'];
  $email=$_POST['email'];
  $password=$_POST['password'];

  $con=mysqli_connect("localhost","root","password","vote") ||
  die("couldn't connect to database");

  if(!$con){
    die("Could't connect to database. try again");
  }
  else{
    echo "connected to db"; /* connection established successfully */
    $query="INSERT INTO candidate(ID,name,email,password)
    VALUES(0,'$name','$email','$password' ) ";
    $result=mysqli_query($con,$query);
    echo ($result)? '1':mysqli_error($con);
  }

?>

Going to phpmyadmin I run the same insert query and data was inserted.

But this code is not inserting data. Even mysqli_error($con) returning a empty string .

I am using XAMPP on Ubuntu 14.04

[Please ask if any more information you need]

Answer 1

I think this is creating the problem,

 $con=mysqli_connect("localhost","root","password","vote") ||
      die("couldn't connect to database");

Change it to

 $con=mysqli_connect("localhost","root","password","vote") or
                                                           ^
      die("couldn't connect to database");

Or

$con = mysqli_connect("localhost", "root", "password", "vote");

if (mysqli_connect_errno()) {
     echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

If you are not seeing error, try adding, error_reporting(E_ALL); in the file.