“致命错误：未捕获的错误：调用成员 function bind_param() on bool”它说

Question

please help it said

Fatal error : Uncaught Error: Call to a member function bind_param() on bool in C:\xampp\htdocs\bmi\connect.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\bmi\connect.php on line 18

 if ( isset($name) || isset($weight) || isset($height) || isset($gender) || isset($age) )
{
    $name = $_POST['name'];
    $weight = $_POST['weight'];
    $height = $_POST['height'];
    $gender = $_POST['gender'];
    $age = $_POST['age'];
   
}

    $conn = new mysqli('localhost', 'root', '', 'test');
    if($conn->connect_error){
        echo "$conn->connect_error";
        die('Connection Failed :' .$conn->connect_error);}
    else{
        $stmt = $conn->prepare("insert into registration(name, weight, height, gender, age)values(?,?,?,?)");
        $stmt->bind_param("siiss", $name, $weight, $height, $gender, $age);
        $execval = $stmt->execute();
        echo $execval;
        echo "Koneksi berhasil";
        $stmt->close();
        $stmt->close();
    }
    

?>

I would appreciate if someone could open a private session through dm on instagram or twitter so i could send my files and you could check where's the problem cause, but if it's too impossible then I wouldn't mind, just help me get through this coding before tomorrow bcs the deadline is tomorrow

Answer 1

You should use bindparam like this.

$stmt->bindParam(1, $name, PDO::PARAM_STR);
$stmt->bindParam(2, $weight, PDO::PARAM_INT);
$stmt->bindParam(3, $height, PDO::PARAM_INT);
$stmt->bindParam(4, $gender, PDO::PARAM_STR);
$stmt->bindParam(5, $age, PDO::PARAM_INT);

In addition, you must add as many question marks (?) as the number of column names you entered.

values(?,?,?,?) >>>> values(?,?,?,?,?)