dynamic variables binding in mysqli bind_param

Question

when i try to below code it give me a warning

mysqli_stmt::bind_param(): Number of elements in type definition string doesn\'t match number of bind variables         


        

Answer 1

$stmt = $mysqli->prepare('SELECT * FROM users WHERE lname = ? AND fname = ?');
$stmt->bind_param('ss', $param[0], $param[1]);
$stmt->execute();

//other version
$stmt = $mysqli->prepare('SELECT * FROM users WHERE lname = ? AND fname = ?');
$type = "ss";
$names = array("Maq", "bool");
$params = array(&$type, &$names[0], &$names[1]);

call_user_func_array(array($stmt, 'bind_param'), $params);