php-mysql count（）查询重复结果

Using count() query with php will cause the result display in looping. How to fix this issue?

phpmyadmin has no problem showing the sum but can't apply it to php code.

$conn = mysqli_connect('localhost','root','','db'); 
if (!$conn) { die('db error'); };
$result = mysqli_query($conn, '
select count(*) as x from users
');

$row = mysqli_fetch_assoc($result);
echo $row['x'];

Expect result :

2 

Actual output :

2222222222222222222222222222222222222222222222222222222222222222222...

I recommend you to use prepared statements.

$conn = new mysqli("localhost", "root", "", "db");
if($stmt = $conn->prepare("SELECT count(*) as x FROM users")) {
    $stmt->execute(); 
    $result = $stmt->get_result();
    while($row = $result->fetch_assoc()) {
        $number = $row['x'];
    }
    $stmt->close();
}else{
    echo "Error";
}
$conn->close();
if(isset($number)){
    echo $number;
}