PHPmysqli的 预处理执行查询语句

 header( 'Content-Type:text/html;charset=utf-8 ');
 require 'prepareSrarment.php';
 $mysqli=new mysqli("localhost", "root", "password, "user1", 3306);
 $mysqli->set_charset("utf8");
 //使用预编译从数据库中查询
 //使用预处理的方法，查询所有ID>5的用户
 $sql="select id,name,email from user1 where id>?";
 $mysqli_stmt=$mysqli->prepare($sql) or die("1".$mysqli_stmt->error);
 //绑定参数
 $id=12;
 $mysqli_stmt->bind_param("i", $id)or die($mysqli_stmt->error);
 //绑定结果集
 $mysqli_stmt->bind_result($id,$name,$email)or die($mysqli_stmt->error);
 //执行
 $mysqli_stmt->execute()or die("2".$mysqli_stmt->error);

 while ($mysqli_stmt->fetch()){
     echo "<br/>---$id---$name----$email";
 }
 $mysqli_stmt->free_result();
 $mysqli_stmt->close();
 $mysqli->close();
 ?>