PHP - I'm Getting An "invalid Argument" Error For My While Loop....

I have a table with a list of users and an edit button and delete button.  When the edit button is pressed on a site it passes the user_id as p_id to the page that catches it and displays the data.  The problem is when I click on the "update user" button, I get the following error:

Warning: Undefined variable $the_user_id in C:\xampp\htdocs\3-19-21(2) - SafetySite\admin\edit_user.php on line 10

Fatal error: Uncaught TypeError: mysqli_fetch_assoc(): Argument #1 ($result) must be of type mysqli_result, bool given in C:\xampp\htdocs\3-19-21(2) - SafetySite\admin\edit_user.php:14 Stack trace: #0 C:\xampp\htdocs\3-19-21(2) - SafetySite\admin\edit_user.php(14): mysqli_fetch_assoc(false) #1 {main} thrown in C:\xampp\htdocs\3-19-21(2) - SafetySite\admin\edit_user.php on line 14

The weird thing is I had another update user page with a table I created that ran the query to update the table in the database just fine.  But as I created it, it didn't look all that great so I recreated the page and used a bootstrap table because of the much cleaner look.  Both pages have the exact same PHP code, the only difference is the bootstrap table I added in.  So I'm really at a loss with this.  Other than the table and PHP code, there is a script at the bottom of the page for the table itself to allow for searching within the table, i'll include that as well.  The PHP code is as follows:

<?php

//THE "p_id" IS BROUGHT OVER FROM THE EDIT BUTTON ON VIEW_ALL_USERS

if (isset($_GET['p_id'])) {

    $the_user_id = $_GET['p_id'];

}

// QUERY TO PULL THE SITE INFORMATION FROM THE p_id THAT WAS PULLED OVER

$query = "SELECT * FROM users WHERE user_id = $the_user_id ";

$select_user = mysqli_query($connection,$query);

//SET VALUES FROM ARRAY TO VARIABLES

while($row = mysqli_fetch_assoc($select_user)) {

    $user_id = $row['user_id'];

    $user_firstname = $row['user_firstname'];

    $user_lastname = $row['user_lastname'];

    $username = $row['username'];

    $user_email = $row['user_email'];

    $user_phone = $row['user_phone'];

    //$user_image = $row['user_image'];

    $user_title_id = $row['user_title_id'];

    $user_role_id = $row['user_role_id'];

   }

THE UPDATE QUERY CODE....................................................................................................................

<?php

if(isset($_POST['update_user'])) {

    $user_id = $_POST['user_id'];

    $user_firstname = $_POST['user_firstname'];

    $user_lastname = $_POST['user_lastname'];

    $username = $_POST['username'];

    $user_email = $_POST['user_email'];

    $user_phone = $_POST['user_phone'];

    //$user_image = $_POST['user_image'];

    $user_title_id = $_POST['user_title_id'];

    $user_role_id = $_POST['user_role_id'];

    $query = "UPDATE users SET ";

    $query .= "user_id = '{$user_id}', ";

    $query .= "user_firstname = '{$user_firstname}', ";

    $query .= "user_lastname = '{$user_lastname}', ";

    $query .= "username = '{$username}', ";

    $query .= "user_email = '{$user_email}', ";

    $query .= "user_phone = '{$user_phone}', ";

    //$query .= "user_image = '{$user_image}', ";

    $query .= "user_title_id = '{$user_title_id}', ";

    $query .= "user_role_id = '{$user_role_id}' ";

    $query .= "WHERE user_id = '{$the_user_id}' ";

    $update_user = mysqli_query($connection,$query);

    if(! $update_user) {

        die("QUERY FAILED" . mysqli_error($connection));

    }

}

?>

THE "UPDATE USER" BUTTON THE USER CLICKS ON TO UPDATE....................................................................................................................

<div class="col-1">

<button class="btn btn-primary" type="submit" name="update_user">Update User</button>

</div>

Any Help is Greatly Appreciated!

I am getting the following error when using composer: "continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"?

Just started.  I am pretty sure composer.json wasn't changed.  journalctl doesn't show anything.  Maybe Doctrine related, however, nothing seems to help.

Any ideas?
 

[michael@devserver www]$ php -v
PHP 7.3.4 (cli) (built: Apr  2 2019 13:48:50) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.3.4, Copyright (c) 1998-2018 Zend Technologies
    with DBG v9.1.9, (C) 2000,2018, by Dmitri Dmitrienko
[michael@devserver www]$ composer -V
Composer version 1.4.2 2017-05-17 08:17:52
[michael@devserver www]$ yum info composer
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirror.us.oneandone.net
 * epel: mirror.rnet.missouri.edu
 * extras: mirror.us.oneandone.net
 * remi-php73: mirror.bebout.net
 * remi-safe: mirror.bebout.net
 * updates: mirror.us.oneandone.net
Installed Packages
Name        : composer
Arch        : noarch
Version     : 1.8.4
Release     : 1.el7
Size        : 1.8 M
Repo        : installed
From repo   : epel
Summary     : Dependency Manager for PHP
URL         : https://getcomposer.org/
License     : MIT
Description : Composer helps you declare, manage and install dependencies of PHP projects,
            : ensuring you have the right stack everywhere.
            :
            : Documentation: https://getcomposer.org/doc/

[michael@devserver www]$ composer update
Loading composer repositories with package information
Updating dependencies (including require-dev)


  [ErrorException]
  "continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"?


update [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--lock] [--no-custom-installers] [--no-autoloader] [--no-scripts] [--no-progress] [--no-suggest] [--with-dependencies] [-v|vv|vvv|--verbose] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--ignore-platform-reqs] [--prefer-stable] [--prefer-lowest] [-i|--interactive] [--root-reqs] [--] [<packages>]...

[michael@devserver www]$