not functioning in while($row->$statement->fetch()) using php PDO - php

Question

if(isset($_POST['btnLogin']))
{
$username = $_POST['txtusername'];
$pass_word = $_POST['txtpassword'];
$hashed_password = crypt(sha1($pass_word));
$sqlQuery = "SELECT * from users WHERE username = :username AND password = :password" ;
$statement = $conn->prepare($sqlQuery);
$statement->execute(array(':username' =>$user , ':password'=>$hashed_password));
while($row->$statement->fetch())
{
$id = $row['id'];
$username = $row['username'];
$password = $row['password'];
if(strcmp('$password', '$hashed_password') == 0)
{
echo "<script type='text/javascript'>console.log("Sucess");</script>";
}
else
{
echo "<script type='text/javascript'>console.log("Failed");</script>";
}
}
}
In here I am implementing the Sign in a page using PHP PDO codes.
I have no previous experience in using PHP PDO.I do the Sign up page without any errors but unfortunately program is not execute after
while($row->$statement->fetch())
here are the HTML codes
<section>
<div class="container">
<div class="login-form">
<h1>Sign In</h1>
<form id="login-form" method="post" action="">
<div class="form-group">
<input type="text" name="txtusername" placeholder="Username" data-validation="required">
</div>
<div>
<input type="password" name="txtpassword" placeholder="Password" data-validation="required">
</div>
<input type="submit" name="btnLogin" value="Login">
</form>
</div>
</div>
</section>
PHP VERSION : 5.3.8
Please give any suggestion to me for solve it

Answer 1

Try the below. If it doesn't work, wrap your query in this and turn error reporting on.
if(isset($_POST['btnLogin']))
{
$username = $_POST['txtusername'];
$pass_word = $_POST['txtpassword'];
$hashed_password = crypt(sha1($pass_word));
$sqlQuery = "SELECT * from users WHERE username = :username AND password = :password" ;
$statement = $conn->prepare($sqlQuery);
$statement->execute(array(':username' =>$user , ':password'=>$hashed_password));
while($row = $statement->fetch_object())
{
$id = $row->id;
$username = $row->username;
$password = $row->password;
if(strcmp('$password', '$hashed_password') == 0)
{
echo '<script type="text/javascript">console.log("Success");</script>';
}
else
{
echo '<script type="text/javascript">console.log("Failed");</script>';
}
}
}