<?
                $kanaly=file("data/kanaly.txt");
                for($i=0;$i<count($kanaly);$i++) $kanaly[$i]=explode(" ",trim($kanaly[$i]));
                $mod=filemtime("data/kanaly.txt");
                if($update && time()-$mod>60) 
                    {
                    for($i=0;$i<count($kanaly);$i++)
                        {
                        if($kanaly[$i][0][0]=="-")
                            {
                            $nkanaly[]=implode(" ",$kanaly[$i]);
                            }
                        elseif($kanaly[$i][0][0]!="#")
                            {
                            $file=@file_get_contents("http://".$kanaly[$i][0]); // načtení zdroje
                            $fingerprint=preg_replace('/\s*/',"",@xslt_transform($file,"feeds-url.xsl"));
                            $md5=md5($fingerprint);
                            $new=($kanaly[$i][2]!=$md5)?"*":"";
                            $fout=fopen("data/".preg_replace('/\W/',"-",$kanaly[$i][0]).".xml","wb");
                            fputs($fout,$file,strlen($file));
                            fclose($fout);
                            $nkanaly[]="{$kanaly[$i][0]} $new $md5";
                            $kanaly[$i][1]=$new;
                            }
                        }
                    $nkf=$fout=fopen("data/kanaly.txt","wb");
                    fputs($nkf,implode("\n",$nkanaly),strlen(implode("\n",$nkanaly)));
                    fclose($nkf);
                    $mod=time();
                    }
                echo"<p>Poslední aktualizace: <strong>".date ("j. n. Y, H:i",$mod)."</strong>. ";
                if(time()-$mod>900) echo"<a href='?update=1'>Aktualizovat. (Bude to chvilku trvat.)</a>";
                echo"</p><div id='ctecka'>";
                for($i=0;$i<count($kanaly);$i++)
                    {
                    if($kanaly[$i][0][0]=="-")
                        {
                        echo($i?"</ul>":"")."<h2>".substr(implode(" ",$kanaly[$i]),1)."</h2><ul>";
                        }
                    elseif($kanaly[$i][0][0]!="#")
                        {
                        $file=@file_get_contents("data/".preg_replace('/\W/',"-",$kanaly[$i][0]).".xml"); // načtení zdroje
                        if($file)
                            {
                            preg_match("/\<\?xml[^>]+encoding=[\"']([a-zA-Z0-9\-]+)[\"']/i", $file, $pole); // zjištění kódování
                            $charset=$pole[1]?$pole[1]:"utf-8"; // pokud nebylo uvedeno, použije se utf-8
                            $charset=preg_replace("/windows\-/i","CP",$charset); // pokud je windows, převede argument pro funkci iconv()
                            if(strtolower($charset)!="utf-8") // pokud je jiné kódování než utf-8
                                {
                                $file=iconv($charset."//TRANSLIT","utf-8",$file); // převede se na utf-8
                                $file=preg_replace("/\<\?xml([^>]+)(encoding=[\"']([a-zA-Z0-9\-]+)[\"'])/i", "<?xml\\1", $file); // odstraní údaj o kódování z xml
                                }
                            $params["new"]=$kanaly[$i][1];
                            $vysledek=xslt_transform($file,"stylesheet.xsl",$params); // provede xslt transormaci
                            if($vysledek) echo $vysledek; // pokud proběhla správně, vypíše výsledek
                            else $errors[]="Nepodařilo se provést transformaci zdroje: http://".str_replace("&","&amp;",$kanaly[$i][0]);
                            }
                        else $errors[]="Nepodařilo se načíst zdroj: http://".str_replace("&","&amp;",$kanaly[$i][0]);
                        }
                    }
                echo"</ul></div>";
                if(count($errors))echo "<h3>Chyby:</h3><ul><li>".implode("</li><li>",$errors)."</li></ul>"?>