Bazı karakterler değişmiyor "ş,ı,ğ"

function duzenle($veri) {
$bozuk    = array('i','ç','Ç','s','g','ü','ö','I','Ç','S','G','Ü','Ö',' ','?', '`');
$duzgun    = array('i','c','C','s','g','u','o','i','c','S','G','U','O','_','_','');
$veri    = @str_replace($bozuk,$duzgun,$veri);
return $veri;
}
$seo=@duzenle($db_den_cekilen_veri);
echo $seo;

$deneme="şğıç  ŞIÇĞ";
$degistir=@duzenle($deneme);
echo $degistir;
//Böyle bir kendimiz karakter yazarsak
//Ozaman Onun Çıktısı Bu şekilde oluyor Yani çalışıyor ==>sgic__SiCG

<?php

function make_url_friendly($url)
{
    $url = trim($url);
    $url = strtolower($url);

    $find = array('<b>', '</b>');
    $url = str_replace ($find, '', $url);

    $url = preg_replace('/<(\/{0,1})img(.*?)(\/{0,1})\>/', 'image', $url);

    $find = array(' ', '"', '&', '&', '\r\n', '\n', '/', '\\', '+', '<', '>');
    $url = str_replace ($find, '-', $url);

    $find = array('é', 'è', 'ë', 'ê', 'É', 'È', 'Ë', 'Ê');
    $url = str_replace ($find, 'e', $url);

    $find = array('í', 'ı', 'ì', 'î', 'ï', 'I', 'İ', 'Í', 'Ì', 'Î', 'Ï');
    $url = str_replace ($find, 'i', $url);

    $find = array('ó', 'ö', 'Ö', 'ò', 'ô', 'Ó', 'Ò', 'Ô');
    $url = str_replace ($find, 'o', $url);

    $find = array('á', 'ä', 'â', 'à', 'â', 'Ä', 'Â', 'Á', 'À', 'Â');
    $url = str_replace ($find, 'a', $url);

    $find = array('ú', 'ü', 'Ü', 'ù', 'û', 'Ú', 'Ù', 'Û');
    $url = str_replace ($find, 'u', $url);

    $find = array('ç', 'Ç');
    $url = str_replace ($find, 'c', $url);

    $find = array('ş', 'Ş');
    $url = str_replace ($find, 's', $url);

    $find = array('ğ', 'Ğ');
    $url = str_replace ($find, 'g', $url);

    $find = array('/[^a-z0-9\-<>]/', '/[\-]+/', '/<[^>]*>/');

    $repl = array('', '-', '');

    $url = preg_replace ($find, $repl, $url);
    $url = str_replace ('--', '-', $url);

    return $url;
}

?>

echo make_url_friendly($deneme);

$dbhost = "localhost";
$dbname = "ffffff";
$dbuser = "fffffffff";
$dbpass = "fffffffff";
mysql_connect ($dbhost, $dbuser, $dbpass) or die (mysql_error());
@mysql_select_db ($dbname) or die (mysql_error());
						mysql_query("SET NAMES 'latin5'");
						mysql_query("set SESSION character_set_client = latin5");
						mysql_query("set SESSION character_set_connection = latin5");
						mysql_query("set SESSION character_set_results = latin5");

						mysql_query("SET NAMES 'latin5'");
						mysql_query("set SESSION character_set_client = latin5");
						mysql_query("set SESSION character_set_connection = latin5");
						mysql_query("set SESSION character_set_results = latin5");

   mysql_query("set SESSION character_set_connection = latin5");

   mysql_query("set SESSION character_set_connection = latin5_turkish_ci");

<?php

error_reporting(E_ALL ^ (E_NOTICE));

######################
#
### SQL
#
#####################

# current drivers are:
#
# MySQL - "mysql"
# PostgreSQL - "pgsql"
# MSSQL Server - "mssql"
#
# PostgreSQL
# ----------
# for most PostgreSQL default installations,
# running on the same host, you may have to
# comment out the DBHOST and DBPORT lines
#
######################

define("_CAL_SQL_DRIVER_", "mysql");

define("_CAL_DBHOST_", "localhost");
define("_CAL_DBPORT_", "");

define("_CAL_DBUSER_", "xxxxx");
define("_CAL_DBPASS_", 'xxxxx');
define("_CAL_DBNAME_", "xxxxx");

define("_CAL_DBPREFIX_", "takvim_");


##########################################
#
### PATHS AND URLS (with trailing slash)
#
#########################################
define("_CAL_BASE_PATH_", "/home/kullanıcıadı/public_html/takvim/");
define("_CAL_BASE_URL_", "http://www.siteadresim.com/takvim/");


# GLOBAL SETTINGS
####################
require_once(@constant("_CAL_BASE_PATH_") . "include/global_settings.php");



# see include/languages
# for other options
##############################
@define("_CAL_LANG_", "tr_TR"); 

##########################
#
### MAP LINK
#
#########################

# Map link for events with an Address. The default goes to mapquest.com
# with a default country of USA. You may create your own by editing
# include/custom_functions.php To disable the map link, set _CAL_NOMAP_ to 1.
#############################################################################33

@define("_CAL_NOMAP_", 1);


#######################################
#
# LEAVE THESE ALONE
#
#######################################
define("_CAL_ADMIN_USER_", "admin");
set_magic_quotes_runtime(0);
require_once(@constant("_CAL_BASE_PATH_") ."include/php-compat.php");
?>

<?php
/* vim: set expandtab tabstop=4 shiftwidth=4: */
//
// +----------------------------------------------------------------------+
// | Copyright (c) 2004-2006 eXtrovert Software                           |
// +----------------------------------------------------------------------+
// | This source file is subject to the license you agreed to when this   |
// | software package was installed. A copy of the license has also been  |
// | distributed with this software. See LICENSE.txt under the base       |
// | install directory. If you do not have a copy of this license file,   |
// | or obtained this software through a 3rd party without agreeing to    |
// | the license, please cease using this software and send an e-mail to  |
// | [email protected].                                               |
// +----------------------------------------------------------------------+
//
// $Id: global_settings.php,v 1.21 2007/03/18 14:20:40 ian Exp $
//

###################################
#
### CHECK COOKIES FIRST
#
####################################

if($_COOKIE['_CAL_PAGE_MAIN_']) @define('_CAL_PAGE_MAIN_', $_COOKIE['_CAL_PAGE_MAIN_']);
if($_COOKIE['_CAL_LANG_']) @define('_CAL_LANG_', $_COOKIE['_CAL_LANG_']);
if($_COOKIE['_CAL_SITE_NAME_']) @define('_CAL_SITE_NAME_', $_COOKIE['_CAL_SITE_NAME_']);

require_once(@constant("_CAL_BASE_PATH_") . "include/classes/class.sql.php");

# check for user module..
@include_once(@constant("_CAL_BASE_PATH_") ."modules/auth/auth.php");


define("_THYME_VER_", "1.3");
define("_THYME_ENC_", "zend");

global $_cal_sql, $_cal_dbpref;

#$_cal_dbpref = constant("_CAL_DBNAME_").'.'.constant("_CAL_DBPREFIX_");

$_cal_dbpref = constant("_CAL_DBPREFIX_");

$_cal_sql or $_cal_sql = new _cal_sql();

$globs = $_cal_sql->query("select variable, setting from {$_cal_dbpref}GlobalSettings", true);

foreach(array_keys($globs) as $g) {
   @define(trim($g), $globs[$g]);
}

if(!@constant("_CAL_SITE_NAME_")) @define("_CAL_SITE_NAME_", "Thyme");

if(file_exists(_CAL_BASE_PATH_.'modules/locations/class.location.php')) {

   global $_cal_loc_opts;

   $_cal_loc_opts or $_cal_loc_opts = $_cal_sql->query("select variable, setting
       from {$_cal_dbpref}ModuleSettings where module = 'locations'", true);

   @define('_CAL_LOCATIONS_MOD_', ($_cal_loc_opts['installed'] || $_cal_loc_opts['use_locations'
]));

   if($_cal_loc_opts['display_name'])
        define("_LOCATION_", $_cal_loc_opts['display_name']);

   include_once(_CAL_BASE_PATH_.'modules/locations/class.location.php');
}

<?php
ob_start();
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
header("Content-Type: text/html;charset=iso-8859-9");

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
 <HEAD>
  <TITLE> New Document </TITLE>
  <META NAME="Generator" CONTENT="EditPlus">
  <META NAME="Author" CONTENT="">
  <META NAME="Keywords" CONTENT="">
  <META NAME="Description" CONTENT="">
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  
  <script type="text/javascript" src="http://www.google.com/jsapi?key=ABQIAAAAu1pBROz5a4aEpmR_OUioBRQk8fBngkCFsA3p8orwZDTWYL2YxRTCsF1OihwlEYTSbQHH3II6C1caXA"></script>
  <script type="text/javascript">
// <![CDATA[
google.load("jquery", "1.3.2");
google.setOnLoadCallback(function() {
});
// ]]-->
</script>