[david files decoded] check.php

<?php
class licensing
{

    public $db = NULL;

    public function __construct()
    {
        include( "includes/config.php" );
        $this->db = mysqli_connect( $dbhost, $dbuser, $dbpass, $database );
        include( "check.language.php" );
        $this->checkLicence( );
    }

    public function getTodaysDate( )
    {
        $d = date( "Y-m-d" );
        $x = explode( "-", $d );
        return mktime( 0, 0, 0, $x[1], $x[2], $x[0] );
    }

    public function checkLicence( )
    {
        $ip = $_SERVER['REMOTE_ADDR'];
        $domain = addslashes( $_GET['domain'] );
        if ( substr( $domain, 0, 4 ) == "www." )
        {
            $domain = substr( $domain, 4 );
        }
        $sql = sprintf( "select * from `licenses` where `domain_name` = '%s' and `ip_address` = '%s'", $domain, $ip );
        if ( !( $result = $this->db->query( $sql ) ) )
        {
            exit( mysqli_error( $this->db ) );
        }
        if ( $result->num_rows == 0 )
        {
            $sql = sprintf( "select * from `licenses` where `domain_name` = '%s'", $domain );
//================================ PAYMENT ========================================//