如果我在没有任何参数的情况下edit_profile()
运行我的函数,那么空字符串将写入数据库。例如,如果$input['email']
为空,我希望UPDATE
不更新此列。
我尝试做:
SET email = IF(LENGTH(:email)=0, email, :email),
它不起作用,我不确定如何使用 PDO 执行上述操作。
function edit_profile($input) {
//
$user_id = 1;
//
try {
//
$conn = new PDO('mysql:host='.DB_HOST.';dbname='.DB_NAME, DB_USERNAME, DB_PASSWORD);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$stmt = $conn->prepare('UPDATE users SET
email = :email,
password = :password,
name_surname = :name_surname,
age = :age,
sex = :sex,
education = :education,
avatar = :avatar
WHERE id = :id');
$stmt->execute(array(
':id' => $user_id,
':email' => $input['email'],
':password' => $input['password'],
':name_surname' => $input['name_surname'],
':age' => $input['age'],
':sex' => $input['sex'],
':education' => $input['education'],
':avatar' => $input['avatar']
));
echo $stmt->rowCount(); // 1
//
} catch(PDOException $e) {
echo 'ERROR: ' . $e->getMessage();
}
//
}
edit_profile();
尝试
UPDATE users SET
email = COALESCE(NULLIF(:email, ''),email),
password = :password,
name_surname = :name_surname,
age = :age,
sex = :sex,
education = :education,
avatar = :avatar
WHERE id = :id
我基本上是在尝试使用 COALESCE (http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html#function_coalesce) 仅在不为空的情况下使用 :email
。如果为 null,请使用旧email
。
如果:email
是空字符串而不是简单的NULL
,我添加了NULLIF
将空字符串转换为NULL
;)
SET email = IF(LENGTH(:email1)=0, email, :email2)
$stmt->execute(array(
':id' => $user_id,
':email1' => $input['email'],
':email2' => $input['email'],
':password' => $input['password'],
':name_surname' => $input['name_surname'],
':age' => $input['age'],
':sex' => $input['sex'],
':education' => $input['education'],
':avatar' => $input['avatar']
));