function filter($t){
$t = str_ireplace("select",'sеlесt',$t);
$t = str_ireplace("database",'dаtаbаsе',$t);
$t = str_ireplace("table",'tаblе',$t);
$t = str_ireplace("update",'updаtе',$t);
$t = str_ireplace("insert",'insеrt',$t);
$t = str_ireplace("script",'sсriрt',$t);
return $t;
}