<?php
if (isset($_POST['username']) && isset($_POST['password'])) {
    $username       = $_POST['username'];
    $password       = $_POST['password'];
    $hashedPassword = password_hash($password, PASSWORD_DEFAULT);
    //require"databaseConfig.php";
    $sql            = "select * from userreg where UserName = '$username'";
    require "databaseConfig.php";
    $qryResult = mysqli_query($conn, $sql);
    if (mysqli_num_rows($qryResult) > 0) {
        while ($row = mysqli_fetch_assoc($qryResult)) {
            if (password_verify($password, $row['password'])) {
                echo "Hello there $username <br>";
            } else {
                echo "Password is incorrect <br>";
            }
        }
    } else {
        echo "0 results";
    }
} else {
    echo "Error, username or password missing!";
}
?>