joomla 3x将一个字符串插入sql数据库

Question

I'm currently running a joomla 3x portal and need to insert a string into my MySQL database, but have had no success so far (sadly, I'm not a programmer).

So I added a new field into my users table called "ok1" and just want to insert a string into it (actually a hyperlink) and overwrite it every time with the current one on the page that executed the code last.

This is the code I used, but it always "blows" my portal...

$query = $db->getQuery(true);

$columns = "ok1"; 
$values = "my hyperlink";

$query
    ->insert($db->quoteName('#__users'))
    ->columns($db->quoteName($columns))
    ->values($db->quoteName($values));

$db->setQuery($query);
$db->execute();

$query = $db->getQuery(true);

$db->setQuery($query);
$db->execute();

Hopefully somebody can help me out with this one, thanks in advance.

Second attempt:

$content ="test"
$query = $db->getQuery(true);
Update `x__users` SET `ok1`=$content WHERE `user` = $user->id;
$db->setQuery($query);
$result = $db->execute();

Answer 1

I finally got it - thanks to all for help:

For Joomla 3.x

Update a column/field in MySQL-Database via php Display column/field from a MySQL-Database via php

To get the Data into the Database use following Code:

// $columns represent the name of the column/filed in the table
// $values represent the value the column/filed should be updated with
$columns = "ok1"; 
$values = "my hyperlink";

$query = $db->getQuery(true);
$query
    ->update($db->quoteName('#__users')) //the name of the table
    ->set($db->quoteName($columns) . ' = ' . $db->quote($values)) 
    ->where($db->quoteName('id') . ' = ' . $user->id) //the current user ID to match the column "id" 
;

$db->setQuery($query);
$db->execute();

To get the Data out of the Database use following Code:

$query= "SELECT `ok1` FROM `#__users` WHERE `id` = $user->id"; 
$database->setQuery($query);
$ok1_link= $database->loadResult();

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