mysql - pdo执行给出错误

Question

昨天我有一个关于“pdo插入和更新”的主题。现在是以下内容

Warning: PDOStatement::execute() [pdostatement.execute]: SQLSTATE[HY093]: Invalid parameter number: number of bound variables does not match number of tokens in  on line 148

这是我的代码。

$sth = $db->prepare(


'INSERT INTO track (`rsname`, `overallranknow`, `overalllevelnow`, `overallxpnow` )' .
  'VALUES (:name, :Overalln, :Overall1, :Overall2) '. 
  'ON DUPLICATE KEY UPDATE ' .
    "rsname = :name"  .
    "overallranknow = :Overalln" .
    "overalllevelnow = :Overall1" .
    "overallxpnow = :Overall2" 
);
$sth->bindValue(':name', $name, PDO::PARAM_STR);
$sth->bindValue(':Overalln', $Overalln, PDO::PARAM_INT);
$sth->bindValue(':Overall1', $Overall[1], PDO::PARAM_INT);
$sth->bindValue(':Overall2', $Overall[2], PDO::PARAM_INT);
$sth->execute();

错误说我的执行行是错误的1。我已经用数组尝试过，但仍然得到了它。我希望也许知道我的意思。

~Kev(英语不好=抱歉)

Answer 1

来自PDO::prepare manual ;

You must include a unique parameter marker for each value you wish to pass in to the statement when you call PDOStatement::execute(). You cannot use a named parameter marker of the same name twice in a prepared statement.

这(遗憾的是)意味着您必须使用辅助名称复制绑定(bind)，才能在查询中两次使用相同的值。不漂亮，比如；

$sth = $db->prepare(
  'INSERT INTO track (`rsname`, `overallranknow`, `overalllevelnow`, `overallxpnow` )' .
    'VALUES (:name, :Overalln, :Overall1, :Overall2) '. 
    'ON DUPLICATE KEY UPDATE ' .
      "rsname = :name_2"  .
      "overallranknow = :Overalln_2" .
      "overalllevelnow = :Overall1_2" .
      "overallxpnow = :Overall2_2" 
);
$sth->bindValue(':name', $name, PDO::PARAM_STR);
$sth->bindValue(':name_2', $name, PDO::PARAM_STR);
$sth->bindValue(':Overalln', $Overalln, PDO::PARAM_INT);
$sth->bindValue(':Overalln_2', $Overalln, PDO::PARAM_INT);
$sth->bindValue(':Overall1', $Overall[1], PDO::PARAM_INT);
$sth->bindValue(':Overall1_2', $Overall[1], PDO::PARAM_INT);
$sth->bindValue(':Overall2', $Overall[2], PDO::PARAM_INT);
$sth->bindValue(':Overall2_2', $Overall[2], PDO::PARAM_INT);
$sth->execute();

编辑:由于 MySQL 允许 VALUES ON DUPLICATE KEY 中的关键字不必重复参数，您最好使用 @YourCommonSense 针对这种情况的答案。