userId | username | password
----------------------------
  1    | example  |  temp1

public function checkPasswordCorrect($username, $password) {  // Returns true is the entered password is correct and false if it isn't.

   // This creates a mysqli context to run the connection through.
   $mysqli = new mysqli($this->dbHost, $this->dbUsername, $this->dbPassword, $this->dbPlusPlus);

   // If there is an error connecting to the database, it will be printed and the process will close.
   if (mysqli_connect_errno()) {
       printf("Connect failed: %sn", mysqli_connect_error());
       exit();
   }

   $sql = "SELECT password FROM users WHERE username='$username'";
   $result = $mysqli->query($sql);
   $row = $result->fetch_array(MYSQLI_ASSOC);

   $hashedPassword = $row["password"];

   $mysqli->close();

   echo $password."<br>".$hashedPassword."<br>"; // The input is correct and the hash matches that in the table.

   // We return a value of true or false, depending on the outcome of the verification.
   if(password_verify($password, $hashedPassword)) {
       echo "return true";
       return true;
   }
   else {
       echo "return false";
       return false;
   }
}

temp0022
$2y$10$9TgjJzSaqOB
return false