Insert a value into database based on Session's User ID - php

Question

Attempting to insert a Score based on the User's Session ID and POST , I've set up the database to use the UserID as a foreign key constraint but dont know how to do an insert query.
enter image description here
Database Values ^^
My attempt below
<?php
include("php/functions.php");
include('connections/conn.php');
$userID = $_SESSION["userID"];
//echo "all good here";
$newsoanxscore = mysqli_real_escape_string($conn, $_POST['socanxscore']);
$insertquery = "INSERT INTO socanxscore(socialanxietyscore)" . "VALUES('$newsoanxscore')";
$result = mysqli_query($conn, $insertquery) or die(mysqli_error($conn));
mysqli_close($conn);
?>
My insert form
<form action="insertsoanxietyscore.php" method="post">
Insert your score <input type="number" name="socanxscore" /><br><br>
<input type="submit" />
</form>

Answer 1

There are a few things here that may be helpful.
Firstly, you are not passing the user ID into your insert query. which can be written in this case as.
$insertquery = "INSERT INTO socanxscore(socialanxietyscore, UserId) VALUES('$newsoanxscore', '$userID')";
Secondly, please take the time to explore prepared queries to prevent SQL injection when passing end-user input to a database table. You may find the following resource useful.
http://php.net/manual/en/mysqli.prepare.php

Answer 2

go for this:
<?php
session_start();
include("php/functions.php");
include('connections/conn.php');
$userID = $_SESSION["userID"];
if(isset($_POST["socanxscore"]))
{
$query=INSERT INTO socanxscore(socialanxietyscore) VALUES('$newsoanxscore') WHERE userID=$userID";
$result = mysqli_query($conn, $insertquery) or die(mysqli_error($conn));
}
else
{
ehco "error";
}
mysqli_close($conn);
?>