<?php

declare(strict_types=1);

function username_search(object $pdo, string $username) {
    $query = "SELECT username FROM users WHERE username = :username;";

    // Prepare and check if user already exists
    $stmt = $pdo->prepare($query);
    $stmt->bindParam(":username",$username);
    $stmt->execute();
    $result = $stmt->fetch(PDO::FETCH_ASSOC);

    $stmt = null;
    $query = null;

    // True if something is found, false if not
    return $result;
}

function user_write(object $pdo, string $username, string $pwd) {
    $query = "INSERT INTO users (username, pwd) VALUES (:username, :pwd)";

    $stmt = $pdo->prepare($query);
    $stmt->bindParam(":username",$username);
    $stmt->bindParam(":pwd",$pwd);
    $stmt->execute();

    $stmt = null;
    $query = null;
}