Function prepare query - php

Question

I'm doing, or trying to do, a database project for the university, but when registering a user this error appears:
Fatal error: Call to a member function bind_param() on a non-object in (...)
Initially I wrote
$insert = $db->prepare("INSERT INTO customer (name, email, phonenumber, adress, password) VALUES (?, ?, ?, ?, ?");
But then I changed to well, you can see in the code.
<?php
require 'db/connect.php';
require 'functions/security.php';
if(!empty($_POST)) {
if(isset($_POST['name'], $_POST['email'], $_POST['address'], $_POST['phone'], $_POST['password'])) {
$name = trim($_POST['name']);
$email `enter code here` = trim($_POST['email']);
$phone = trim($_POST['phone']);
$address = trim($_POST['address']);
$password = trim($_POST['password']);
if(!empty($name) && !empty($email) &&!empty($phone) && !empty($address) &&!empty($password)){
$insert = $db->prepare("INSERT INTO customer VALUES (?, ?, ?, ?, ?");
$insert->bind_param('ssiss', $name, $email, $phone, $address, $password);
//$insert->close();
if($insert->execute()){
print_r("Done");
die();
}
}
}
}
?>

Answer 1

Call to a member function in query's means that the query couldn't get executed because it contains an error.
In this case, you didn't closed the VALUES ().
Change $insert = $db->prepare("INSERT INTO customer VALUES (?, ?, ?, ?, ?"); to $insert = $db->prepare("INSERT INTO customer VALUES (?, ?, ?, ?, ?)");
Make sure you do check if an error could get executed.
Example of checking if an query could get executed:
$query = $this->_db->prepare("SELECTTEST name FROM user"); //.. Bad query (false)
if(!$query) //.. If the query is false.
{
trigger_error('Query couldn\'t get executed');
}
If this solved your error, I will really appreciate that you vote my answer as answer.