MySQLi warning with php7 - php

Question

I'm getting the following errors from php7 on a new Ubuntu server:
Notice: Trying to get property of non-object in ~/tLogServ.php on line 14
Warning: mysqli::query(): Couldn't fetch mysqli in ~/tLogServ.php on line 17
Fatal error: Uncaught Error: Call to a member function fetch_assoc() on null in ~/tLogServ.php:18
Stack trace:
0 {main}thrown in ~/tLogServ.php on line 18
Here's the tLogServ.php
<?php
header("Access-Control-Allow-Origin: *");
header("Content-Type: application/json; charset=UTF-8");
$request = json_decode( file_get_contents('php://input') );
$variable = $request->data;
// echo($variable);
$result = $conn->query("SELECT password FROM login where userID LIKE 'technician'");
$rows = $result->fetch_assoc();
$passHashed = $rows['password'];
if(password_verify($variable, $passHashed)){
$loginMess = "success";
}else{
$loginMess = "fail";
}
echo json_encode($loginMess);
$conn->close();
?>
and my connection script
<?php
DEFINE ('user', '$%^*(');
DEFINE ('pass', '^*&%*');
DEFINE ('host', '1*&^*&^');
DEFINE ('DB', '^*%*(&%^');
$conn = new mysqli(host, user, pass, DB) OR die('Fail Whale ' . mysqli_connect_error());
?>
The notice will go away with input, but I'm unsure about and the warning and the fatal error it causes.
This code works without issue on Ubuntu 14 with PHP5. I've uncommented
extension=php_mysqli.dll
in php.ini. This is obviously a compatibility issue, but I'm unsure if I need to re-write my code or if it's a matter of a simple setting that I can't find.

Answer 1

The issue was two stupid mistakes.
1)The user I referenced in my connection was not given proper rights.
and
2) 'Host' was defined as the IP of the localhost. For whatever reason this worked on Cat connection, but not on WiFI (both had static Ip's).
For others with the same/similar issue. Verify that your php.ini mysqli extension is enabled/uncommmented. As A.L was onto the issue was with mySQL settings not PHP/Ubuntu.