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Zkus na hotscripts.com najít už nějaký hotový...

$text = Str_Replace("slovo", "slovo2", $text);

toto nahradi slovo slovem2

nejlíp je vytvořit array a fci strtr();

$text = "nějaký text který muže obsahovat slovo1 nebo slovo2 nebo nejaké jiné špatné";

$nahrad = array( "slovo1" => "nahrada1", "slovo2" => "nahrada2");



$text = strtr($text, $nahrad);

echo $text; //mělo by vypasat: nějaký text který muže obsahovat nahrada1 nebo nahrada2 nebo nejaké jiné špatné

krteczek

ajinek
"jak udělat smajly"
Resim javascriptem JS, http://mracek.xhosting.cz/chat/
(protoze je mensi zprava v databazi)

"jak filtrovat sprostá slova"
Resim PHP, http://mracek.xhosting.cz/chat/

function filterWords($text)
{
$a="[aeiouyáéíóúý]";
$search = array (
"/trtk[aá]/i",
"/((\wop|[^ou]p|^p)i[cč](k?)$a)/i",
"/(kurv$a)|(kuriev)|(kurev)/i",
"/kokot/i",
"/(jeba[lntť])|(jebe)|(jebnu[lntť])|(jeb[kl]$a)/i",
"/(drba[lntť])|(drbe)|(drbnu[lntť])|(drb[kl]$a)/i",
"/debil/i",
"/asshole/i","/bitch/i","/\Wfokya/i","/\Wfok ya/i","/\Wfoksya/i","/fuck/i","/moron/i","/scheise/i","/shit/i","/\Wsu ck/i"
//lasucka,kuriatko,opicka,?pupicky,?spickove
);
$replace = array ();
foreach ($search as $key => $value)
{$replace[$key]="\[pip\]";}
$text = preg_replace($search, $replace, $text);

//if(substr_count($text, "PI*A") > 3) {msgsystem($komu,$n,$sess)}

return $text;
}
... toto je filtrovani s kombinacemi, ale mozna by stacilo si ty kombinace vypsat viz krteczek

"když někdo zadá link aby to byl link"
Resim javascriptem JS, http://mracek.xhosting.cz/chat/
(protoze je mensi zprava v databazi)
(najdi si ve zdrojovem kodu)




a tady jeste jiny system filtrovani
$filter = array(
"bullshit","asshole","shit","scheise",
"www.pokec.sk","www.azet.sk","www.pokec.azet.sk","pokec.azet.sk","www. topchat.sk","topchat",
"zajebať","zajebat","zajebal",
"vytrtkame",
"vyjebaný","vyjebany","vyjebaní","vyjebani",
"vydrbaný","vydrbany","vydrbaní","vydrbani",
"ujebané","ujebane","ujebať","ujebat",
"trtkat",
"skurvený","skurveny",
"pičy","picy","piču","picu","pičoviny","picoviny","pičovini","picovini ","pičovina","picovina","pičou","picou","pičo","pico","pičky","picky", "pičku","picku","pičko","picko","pički","picki","pičí","piči","pici"," piče","pice","pičami","piča","pica",
"kurvy","kurvu","kurvo","kurvi","kurve","kurva","kuriev","kurevský","k urevsky",
"kokoty","kokotov","kokotský","kokotskí","kokotská","kokotmy","kokotmi ","kokotiny","kokotini","kokotina","kokoti","kokota","kokot",
"jebnutých","jebnutych","jebnutým","jebnutym","jebnutý","jebnuty","jeb nutím","jebnutim","jebnutí","jebnuti","jebnutému","jebnutemu","jeblo", "jebko","jebe","jebať","jebat","jebal","jeb",
"drbnutých","drbnutych","drbnutích","drbnutich","drbnutým","drbnutym", "drbnutím","drbnutim","drbnuty","drbnutý","drbnutí","drbnuti","drbko", "drbe","drbať","drbat",
"dojebať","dojebat","dojebané","dojebane",
"bitch","fucking","bitch","moron","sucker","suck","fucker","fuck","fok ya","fok ya",
"webforum"
);

foreach($filter as $vulgarizmus)
{
$text=str_ireplace($vulgarizmus,"<SPAN class=\"cenzura\">[CENZÚRA]</SPAN>",$text);
}

peta
veľmi pekná databáza neslušných slov :-D