How to write data from VK request to database?

Question

PHP

Here is the answer to the request from VK -

Array ( [response] => Array ( [0] => Array ( [first_name] => Виталий [id] => 334626026 [last_name] => Милеев [can_access_closed] => 1 [is_closed] => [sex] => 2 ) ) )

How do I write "sex" to the database?

$query = "INSERT INTO `user`(`user_id`,`sex`) VALUES ($user_id,'".$result['sex']."')";

Here's what I tried, but it doesn't record.
Here is the query -

$request_params = array( 
      'user_ids' => '334626026',
      'access_token' => '123123',
      'fields' => 'sex', 
      'v' => '5.131'
    ); 
    $date = http_build_query($request_params); 
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $date);
    curl_setopt($ch, CURLOPT_URL,"https://api.vk.com/method/users.get?");
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $result = curl_exec($ch);
    	$result =  json_decode($result, 1);

Answer 1

Work out the skill of how to insert something into the database at all.
For example, like this https://html5css.ru/php/php_mysql_insert.php
Please note that the process of interacting with the database has several phases of work:
connecting to the database, creating a query, adding parameters to the query, executing the query and getting the result (if needed) action status or selection).