<?php
    $host = 'localhost';
    $database = 'p707674r_tests';
    $user = 'p707674r_tests';
    $password = '2795778j';

    function db_connect(){
        global  $link = mysqli_connect($host, $user, $password, $database)
        or die("Ошибка " . mysqli_error($link));
    }

    function db_disconnect(){
        mysqli_close($link);
    }
?>