PHP MYSQL update table - php

Question

I'm using MYSQL and php to insert data into my sql.
I have two tables users and userrights.
I'm using checkbox to display rights on user edit page. when rights are de-selected or select i wont to update my userrights table.
CREATE TABLE userrights (
userid int(11) NOT NULL default '0',
right_name varchar(50) collate latin1_general_ci NOT NULL default '',
PRIMARY KEY (userid,right_name)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;
INSERT INTO userrights (userid, right_name) VALUES
(1, 'add'),
(1, 'delete'),
(1, 'edit'),
(1, 'view'),
(2, 'add'),
(2, 'delete'),
(2, 'edit'),
(2, 'view');
CREATE TABLE users (
id int(11) NOT NULL,
`name` varchar(100) collate latin1_general_ci default NULL,
email varchar(100) collate latin1_general_ci default NULL,
pass varchar(42) collate latin1_general_ci default NULL,
PRIMARY KEY (id)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;
INSERT INTO users (id, name, email, pass) VALUES
(1, 'name', 'email#email.com', '5f4dcc3b5aa765d61d8327deb882cf99'),
(2, 'name name', 'email2#email.com', '1a1dc91c907325c69271ddf0c944bc72');
how do I do this?

Answer 1

I've had a similar problem before.
The solution I came up with is truncate the table and reinsert all of the selected entries.

Answer 2

You get the data of the checkbox(true or false)
$rows = mysql_num_rows(mysql_query("SELECT * FROM userrights WHERE id = 'x' and right_name = 'y'"); // Please use insted of mysql_* PDO or MySQLi
if ($rows > 0)
{
if ($checkbox == false)
{
mysql_query("DELETE FROM userrights WHERE id = 'x' AND right_name = 'y'");
}
}
else
{
// Recht nicht vorhanden --> if checkbox == true
if ($checkbox == true)
{
mysql_query("INSERT INTO... VALUES ($id, $right_name)
}
}
First you check if the user had the right. If yes you need to check if the right (data from checkbox) is set to false --> delete that row from the table.
If the user hadn't that right and the checkbox is true, you must insert that in your mysql_table.
The comments must be changed to and if-clause in your code.