Store fields in the database and read the same in logging - php

Question

after connecting wordpress with another server, I get a special ID from that other server, but it is related to the ID from the wordpress user, how can I save this second ID to the base, and submit it to the user who after the login ?
$user_id = $arr['id'];
if($user_id){
$_SESSION['user_id'] = $user_id;
/* Attempt MySQL server connection. Assuming you are running MySQL
server with default setting (user 'root' with no password) */
$link = mysqli_connect("localhost", "root", "", "localm");
// Check connection
if($link === false){
die("ERROR: Could not connect. " . mysqli_connect_error());
}
//
// Attempt insert query execution
$sql = 'INSERT INTO wp_users (user_id) VALUES ("'.$user_id=$_SESSION['user_id'].'");';
if(mysqli_query($link, $sql)){
echo "Records inserted successfully.";
} else{
echo "ERROR: Could not able to execute $sql. " . mysqli_error($link);
}
// Close connection
mysqli_close($link);
I am currently using $ _SESSION and this id is saved while in that browser, but when the time it is signed it is gone. That is why I have to keep it in the base .. Which resets would be the easiest for this case? Thanks everyone

Answer 1

This will work with you if I understood the question ..
You will save the another ID to the add_user_meta, Then call it using the current Wordpress user ID and get_user_meta
function save_ID( $user )
{
//get current user details
if( !$user ) { $user = wp_get_current_user(); }
//check if session registered
if( !isset($_SESSION['user_id']) ){ return; }
//store the 2nd ID to user_meta
$user_id = $user->ID;
$another_id = esc_html( esc_js( $_SESSION['user_id'] ) );
add_user_meta( $user_id, 'user_2nd_id', $another_id);
}
add_action( 'wp_login', 'save_ID');
I hope I helped you.
Thanks.