<?php
    $mysqlUserName      = "Your Username";
    $mysqlPassword      = "Your Password";
    $mysqlHostName      = "Your Host";
    $DbName             = "Your Database Name here";
    $backup_name        = "mybackup.sql";
    $tables             = "Your tables";

        $mysqli = new mysqli( $mysqlHostName,$mysqlUserName,$mysqlPassword,$DbName);
        $mysqli->select_db($DbName);
        $mysqli->query("SET NAMES 'utf8'");

        if (file_exists($DbName)) {
                $sqlSource = file_get_contents($backup_name);
                if (!$mysqli->multi_query($sqlSource)) {
                    echo 'Error: Import Fail';
                } else {
                    echo 'Restore Completed';
                }
        } else {
                echo 'Error: Backup File ('.$backup_name.') Does Not Exists';
        }
?>