Php 尝试通过webapp编辑数据库时出现错误SQLSTATE[HY093]

当我尝试编辑数据库时，出现以下错误：

SQLSTATE[HY093]：参数编号无效：未定义参数

有一些问题与此错误有关，但它们似乎不适用于此案例。谢谢

<php
 ini_set('display_startup_errors',1);
 ini_set('display_errors',1);
 error_reporting(-1);

    require_once 'db.php';  
    if(isset($_POST['submit']))
    {
       $get_id=$_REQUEST['id'];   
       $name=$_POST['name'];
       $surname=$_POST['surname'];
       $pic = $_FILES['pic']['name'];

        try{           
            move_uploaded_file($pic,"uploads/$pic");
            $stmt = $db_con->prepare("UPDATE posts SET
            name=:name,surname=:surname,pic=:pic WHERE id=:GET_id");

            $stmt->bindParam(":id", $id);
            $stmt->bindParam(":name", $name);
            $stmt->bindParam(":surname", $surname);
            $stmt->bindParam(":pic", $pic);

                 if($pic=="")    {
                                  move_uploaded_file($pic,"uploads/$pic");
                                  ("UPDATE posts SET name=:name, surname=:surname, pic=:pic WHERE id=:GET_id");

            $stmt->bindParam(":id", $id);
            $stmt->bindParam(":name", $name);
            $stmt->bindParam(":surname", $surname);
            $stmt->bindParam(":pic", $pic);
    }
         if($stmt->execute())
        {
            echo "<script>alert('Successfully Updated!!!'); window.location='index.php'</script>";
        }
        else{
            echo "Query Problem";
        }
    }
    catch(PDOException $e){
            echo $e->getMessage();
        }  
    }
?>

在两个查询中将GET_id更改为id

WHERE id=:id

这里还将$get_id更改为$id，因为您在下面的代码中使用了$id

$id = $_REQUEST['id'];