致命错误：在第86行的/home/u163876569/public_html/register.php中调用非对象的成员函数prepare（）[复制]

Question

This question already has an answer here:

• Reference - What does this error mean in PHP? 34 answers

I have no idea what this error means dose anyone know what it means

Fatal error: Call to a member function prepare() on a non-object in /home/u163876569/public_html/register.php on line 86

$checkUsername = $odb -> prepare("SELECT COUNT(*) FROM `users` WHERE `username` = :username");

Thats line 86

</div>

Answer 1

Connect to your DB first

$odb = new PDO("mysql:host=$my_db_host;dbname=$my_db_database", $my_db_username, $my_db_password);

if there is no error produced on this and you still get that Fatal error: Call to a member function prepare() on a non-object error, i can guess maybe something is wrong with the scope of $odb variable