PDO 最后插入 ID 总是正确的吗?

2021-12-26 00:00:00 php pdo

我有以下代码:

<?
$query =$db->prepare("INSERT INTO a_table (id, a_field) VALUES ('', (:a_field)");
$query->bindParam(":a_field", $a_value);
$query->execute();
$last_id = $db->lastInsertId('a_table');
?>

我想问的是这个.想象一下,当两个人完全同时加载页面时,是否有可能在检索到最后一个 ID 之前插入其他人的查询从而混淆 ID 的危险?

What I want to ask is this. Imagine when two people load the page at exactly the same time, is it a possible danger that the other persons query is inserted before the last ID is retrieved, mixing up the IDs?

推荐答案

不,这种情况是不可能的.方法 $db->lastInsertId() 返回此数据库连接的最后插入的 id.在其他页面将是另一个连接和另一个最后插入的 id.

No, this situation is impossible. Method $db->lastInsertId() returns last inserted id for this DB conection. In other page will be another connection and another last inserted id.

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