Php 将列链接到不同的表

好吧，我不认为这是可能的，但我想确定一下。假设我有一个名为wp_users和forum_users的表。在wp_用户中有用户名、电子邮件和md5哈希列。论坛用户也是如此。有没有一种方法可以将这两种方法进行同步

INSERT INTO wp_users (username, password, email)
VALUES ('$_POST[username]', '$_POST[password]', '$_POST[email]'); 

会自动完成吗

INSERT INTO forum_users (username, password, email)
VALUES ('$_POST[username]', '$_POST[password]', '$_POST[email]'); 

与ALTER等相同。

使用事务

BEGIN
 INSERT INTO wp_users (username, password, email)
 VALUES ('$_POST[username]', '$_POST[password]', '$_POST[email]');
 INSERT INTO forum_users (username, password, email)
 VALUES ('$_POST[username]', '$_POST[password]', '$_POST[email]'); 
COMMIT;

---

您可以利用MySQL触发器来自动执行此操作

CREATE TRIGGER after_insert_wp_users
AFTER INSERT ON wp_users FOR EACH ROW
BEGIN
    INSERT INTO forum_users (username, password, email)
    VALUES (NEW.username, NEW.password, NEW.email);
END

您可以对更新和其他查询执行相同的操作

编辑1:

CREATE TRIGGER after_insert_wp_users
AFTER INSERT ON wp_users FOR EACH ROW
BEGIN
    IF @__disable_trigger_users = 1 THEN
        SET @__disable_trigger_users = NULL;
    ELSE
        SET @__disable_trigger_users = 1;
        INSERT INTO forum_users (username, password, email)
        VALUES (NEW.username, NEW.password, NEW.email);
    END IF;
END

CREATE TRIGGER after_insert_forum_users
AFTER INSERT ON forum_users FOR EACH ROW
BEGIN
    IF @__disable_trigger_users = 1 THEN
        SET @__disable_trigger_users = NULL;
    ELSE
        SET @__disable_trigger_users = 1;
        INSERT INTO wp_users (username, password, email)
        VALUES (NEW.username, NEW.password, NEW.email);
    END IF;
END

在这种情况下，两个表都需要自动更新，即如果在表

wp\u users

中插入一行，它将自动插入

forum\u users

中，反之亦然，编写第二组触发器从forum\u users更新wp\u users表将引入递归循环

DROP PROCEDURE IF EXISTS proc_insert_user 
GO

CREATE PROCEDURE proc_insert_user
(
    IN  p_username   VARCHAR(15),
    IN  p_password   VARCHAR(15),
    IN  p_email      VARCHAR(15)  
)

BEGIN

    INSERT INTO wp_users (username, password, email)
    VALUES (p_username, p_password, p_email);

    INSERT INTO forum_users (username, password, email)
    VALUES (p_username, p_password, p_email);

END
GO

CALL proc_insert_user('$_POST[username]', '$_POST[password]', '$_POST[email]')
GO

为了避免这种情况，我们可以使用一个状态变量来检查是否应该进行二次插入

触发器1:

CREATE TRIGGER after_insert_wp_users
AFTER INSERT ON wp_users FOR EACH ROW
BEGIN
    IF @__disable_trigger_users = 1 THEN
        SET @__disable_trigger_users = NULL;
    ELSE
        SET @__disable_trigger_users = 1;
        INSERT INTO forum_users (username, password, email)
        VALUES (NEW.username, NEW.password, NEW.email);
    END IF;
END

CREATE TRIGGER after_insert_forum_users
AFTER INSERT ON forum_users FOR EACH ROW
BEGIN
    IF @__disable_trigger_users = 1 THEN
        SET @__disable_trigger_users = NULL;
    ELSE
        SET @__disable_trigger_users = 1;
        INSERT INTO wp_users (username, password, email)
        VALUES (NEW.username, NEW.password, NEW.email);
    END IF;
END

触发器2:

CREATE TRIGGER after_insert_wp_users
AFTER INSERT ON wp_users FOR EACH ROW
BEGIN
    IF @__disable_trigger_users = 1 THEN
        SET @__disable_trigger_users = NULL;
    ELSE
        SET @__disable_trigger_users = 1;
        INSERT INTO forum_users (username, password, email)
        VALUES (NEW.username, NEW.password, NEW.email);
    END IF;
END

CREATE TRIGGER after_insert_forum_users
AFTER INSERT ON forum_users FOR EACH ROW
BEGIN
    IF @__disable_trigger_users = 1 THEN
        SET @__disable_trigger_users = NULL;
    ELSE
        SET @__disable_trigger_users = 1;
        INSERT INTO wp_users (username, password, email)
        VALUES (NEW.username, NEW.password, NEW.email);
    END IF;
END

编辑2

您也可以使用MySQL存储过程来实现同样的功能

DROP PROCEDURE IF EXISTS proc_insert_user 
GO

CREATE PROCEDURE proc_insert_user
(
    IN  p_username   VARCHAR(15),
    IN  p_password   VARCHAR(15),
    IN  p_email      VARCHAR(15)  
)

BEGIN

    INSERT INTO wp_users (username, password, email)
    VALUES (p_username, p_password, p_email);

    INSERT INTO forum_users (username, password, email)
    VALUES (p_username, p_password, p_email);

END
GO

CALL proc_insert_user('$_POST[username]', '$_POST[password]', '$_POST[email]')
GO

---

我说的是数据库结构本身，这样你就不必使用它了。我想设置现有的数据库结构，以便在不修改核心文件的情况下同时更新论坛和wordpress站点数据库。因此，要完全同步它们，我可以这样做，只需更改值，以便您可以通过论坛更新wp数据库？对。您可以从

forum\u users

表中为更新

wp\u用户

表编写类似的触发器。需要检查这是否会产生某种循环/死锁…我已经为上面的循环问题添加了一个解决方案。我已经编辑了这篇文章，以包含使用存储过程的替代解决方案。希望有帮助。