我正在处理使用 PDO 类创建的一系列查询,在某些情况下,我的查询需要相同的参数。 我创建了一个用于保存数据的 foreach 语句的数组,但一些变量来自外部,我可以在一个查询中同时使用这两个数据吗?
例子:
// $connection is the PDO object;
// $full_data contains:
// $full_data[$i]["address"]
// $full_data[$i]["phone"]
// $full_data[$i]["email"]
// $full_data[$i]["user_id"]
// $full_data[$i]["surname"] // not used but present
// $full_data[$i]["name"] // not used but present
$sql = "UPDATE users_table SET city = :address, phone = :phone, email = :email, admin_id = :admin_id, admin_name = :admin_name WHERE user_id = :user_id";
$statement = $connection->prepare ($sql);
$statement->bindParam (':admin_id', trim($admin_id), PDO::PARAM_INT);
$statement->bindParam (':admin_name', trim($admin_name), PDO::PARAM_STR);
foreach ($full_data as $value) {
$ok = $statement->execute ($value);
$num = $statement->rowCount ();
}
} catch (PDOException $e) {
return $e->getMessage ();
}
此页面返回错误:
SQLSTATE[HY093]:参数编号无效:绑定(bind)变量的数量与标记的数量不匹配
到底是什么问题,在 UPDATE 语句上该技术有效
最佳答案
该死,几个小时后我发现了问题......
// $connection is the PDO object;
// $full_data contains:
// $full_data[$i]["address"]
// $full_data[$i]["phone"]
// $full_data[$i]["email"]
// $full_data[$i]["user_id"]
// ==> $full_data[$i]["surname"] // not used but present
// ==> $full_data[$i]["name"] // not used but present
查询 ["surname"]
和 ["name"]
中未保存的数组数据会产生错误。
好像execute();
需要精确的数组数据结构。
我用这个解决了这个问题:
$sql = "UPDATE users_table SET city = :address, phone = :phone, email = :email, admin_id = :admin_id, admin_name = :admin_name WHERE user_id = :user_id";
$statement = $connection->prepare ($sql);
// must be removed ==> $statement->bindParam (':admin_id', trim($admin_id), PDO::PARAM_INT);
// must be removed ==> $statement->bindParam (':admin_name', trim($admin_name), PDO::PARAM_STR);
for ($i = 0; $i < count($full_data); $i++) {
$full_data[$i]["admin_name"] = "the admin name";
$full_data[$i]["admin_id"] = "100";
unset ($full_data[$i]["surname"]); // IMPORTANT: must remove the unused vars
unset ($full_data[$i]["name"]); // IMPORTANT: must remove the unused vars
}
foreach ($full_data as $value) {
// bindParam can be avoided, but it's recommended for data type security
$statement->bindParam(':address', trim($value['address']), PDO::PARAM_STR);
$statement->bindParam(':phone', trim($value['phone']), PDO::PARAM_STR);
$statement->bindParam(':email', trim($value['email']), PDO::PARAM_STR);
$statement->bindParam(':admin_id', trim($value['admin_id']), PDO::PARAM_INT);
$statement->bindParam(':admin_name', trim($value['admin_name']), PDO::PARAM_STR);
$ok = $statement->execute ($value);
$num = $statement->rowCount ();
}
} catch (PDOException $e) {
return $e->getMessage ();
}
关于php - PDO 准备语句中的参数编号无效,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/2105015/