PHP Database Insert Failure: Non-Object Property Error

Data and Databases
1

Encountering an error while executing a PHP database insert. It mentions a non-object property in a class file. How can this issue be resolved?

<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);

require('dbconfig.php');
require('DataHandler.php');

$userEmail = filter_input(INPUT_POST, 'userEmail', FILTER_SANITIZE_EMAIL);
$commCode  = filter_input(INPUT_POST, 'commCode', FILTER_SANITIZE_STRING);
$groupName = filter_input(INPUT_POST, 'groupName', FILTER_SANITIZE_STRING);

$handler = new DataHandler();
$handler->connect();

$insertStatus = $handler->addGroup($userEmail, $commCode, $groupName);

$handler->disconnect();
?>

<?php
class DataHandler {
  private $connection;

  public function connect() {
    $this->connection = new mysqli(DB_HOST, DB_USER, DB_PASS, DB_NAME);
    if ($this->connection->connect_error) {
      throw new Exception('Connection error: ' . $this->connection->connect_error);
    }
  }

  public function disconnect() {
    if ($this->connection) {
      $this->connection->close();
    }
  }

  public function addGroup($email, $code, $name) {
    $stmt = $this->connection->prepare('INSERT INTO groups (user_email, comm_code, group_name) VALUES (?, ?, ?)');
    if (!$stmt) {
      throw new Exception('Preparation failed: ' . $this->connection->error);
    }
    $stmt->bind_param('sss', $email, $code, $name);
    return $stmt->execute();
  }
}
?>
2

hey nova, i had a similar hiccup once. maybe the connect function wasn’t being called properly before addGroup? did u try checking if $handler->connection is set? im curious if any subtle config err might be tripping u. what do u think?