/Quản lý website trường trung học phổ thông PHP/lc1/includes/timezone.php

<?php
/**
 * @Project NUKEVIET 3.0
 * @Author VINADES.,JSC (contact@vinades.vn)
 * @Copyright (C) 2010 VINADES.,JSC. All rights reserved
 * @Createdate 31/05/2010, 00:36
 */

if ( ! defined( 'NV_MAINFILE' ) ) die( 'Stop!!!' );

//Xac dinh ten mui gio
function nv_getTimezoneName_from_cookie ( $cookie )
{
    unset( $matches );
    if ( preg_match( "/^([\-]*\d+)\.([\-]*\d+)\.([\-]*\d+)\|(.*)$/", rawurldecode( $cookie ), $matches ) )
    {
        $ini = file( NV_ROOTDIR . '/includes/ini/timezone.ini' );
        $timezones = array();
        foreach ( $ini as $i )
        {
            unset( $ms );
            if ( @preg_match( '/\[(.+)\]/', $i, $ms ) )
            {
                $last = trim( $ms[1] );
            }
            elseif ( @preg_match( '/(.+)[ ]*=[ ]*[\"|\'](.+)[\"|\']/', $i, $ms ) )
            {
                $timezones[$last][trim( $ms[1] )] = trim( $ms[2] );
            }
        }
        foreach ( $timezones as $name => $offset )
        {
            if ( $offset['winter_offset'] == intval( $matches[2] ) * 60 && $offset['summer_offset'] == intval( $matches[2] ) * 60 ) return $name;
        }
    }
    return '';
}

unset( $matches, $matches2 );
$global_config['cookie_prefix'] = ( empty( $global_config['cookie_prefix'] ) ) ? "nv3" : $global_config['cookie_prefix'];

if ( isset( $_COOKIE[$global_config['cookie_prefix'] . '_cltn'] ) )
{
    $nv_cltn = base64_decode( $_COOKIE[$global_config['cookie_prefix'] . '_cltn'] );
    if ( preg_match( "/^([^\.]+)\.([\-]*\d+)\.(\d{1})$/", $nv_cltn, $matches ) )
    {
        define( 'NV_CLIENT_TIMEZONE_NAME', $matches[1] );
        define( 'NV_CLIENT_TIMEZONE_OFFSET', $matches[2] );
        define( 'NV_CLIENT_TIMEZONE_DST', $matches[3] );
    }
    else
    {
        setcookie( $global_config['cookie_prefix'] . '_cltn', false, time() - 86400 );
    }
}

if ( ! defined( 'NV_CLIENT_TIMEZONE_NAME' ) and isset( $_COOKIE[$global_config['cookie_prefix'] . '_cltz'] ) and preg_match( "/^([\-]*\d+)\.([\-]*\d+)\.([\-]*\d+)\|(.*)$/", rawurldecode( $_COOKIE[$global_config['cookie_prefix'] . '_cltz'] ), $matches2 ) )
{
    $client_timezone_name = nv_getTimezoneName_from_cookie( $_COOKIE[$global_config['cookie_prefix'] . '_cltz'] );
    if ( ! empty( $client_timezone_name ) )
    {
        define( 'NV_CLIENT_TIMEZONE_NAME', $client_timezone_name );
        define( 'NV_CLIENT_TIMEZONE_OFFSET', $matches2[3] * 60 );
    }
    else
    {
        $sd = floor( $matches2[2] >= 0 ? $matches2[2] / 60 : - $matches2[2] / 60 );
        define( 'NV_CLIENT_TIMEZONE_NAME', ( $matches2[2] >= 0 ? "+" : "-" ) . str_pad( $sd, 2, '0', STR_PAD_LEFT ) . ":00" );
        define( 'NV_CLIENT_TIMEZONE_OFFSET', floor( $matches2[3] / 60 ) * 3600 );
    }
    define( 'NV_CLIENT_TIMEZONE_DST', $matches2[1] != $matches2[2] ? 1 : 0 );
    $client_timezone_name = base64_encode( NV_CLIENT_TIMEZONE_NAME . '.' . NV_CLIENT_TIMEZONE_OFFSET . '.' . NV_CLIENT_TIMEZONE_DST );
    setcookie( $global_config['cookie_prefix'] . '_cltn', $client_timezone_name, 0, $matches2[4], '', 0 );
    unset( $client_timezone_name, $sd );
}

if ( empty( $global_config['site_timezone'] ) and defined( 'NV_CLIENT_TIMEZONE_NAME' ) ) $global_config['site_timezone'] = NV_CLIENT_TIMEZONE_NAME;

if ( ! empty( $global_config['site_timezone'] ) )
{
    $ok = false;
    if ( ! $ok and $sys_info['ini_set_support'] and ! function_exists( 'date_default_timezone_set' ) )
    {
        ini_set( 'date.timezone', $global_config['site_timezone'] );
        if ( strcasecmp( ini_get( 'date.timezone' ), $global_config['site_timezone'] ) == 0 )
        {
            define( 'NV_SITE_TIMEZONE_GMT_NAME', preg_replace( "/^([\+|\-]{1}\d{2})(\d{2})$/", "$1:$2", date( "O" ) ) );
            define( 'NV_SITE_TIMEZONE_NAME', $global_config['site_timezone'] );
            $ok = true;
        }
    }
    
    if ( ! $ok and function_exists( 'date_default_timezone_set' ) )
    {
        date_default_timezone_set( $global_config['site_timezone'] );
        if ( strcasecmp( date_default_timezone_get(), $global_config['site_timezone'] ) == 0 )
        {
            define( 'NV_SITE_TIMEZONE_GMT_NAME', preg_replace( "/^([\+|\-]{1}\d{2})(\d{2})$/", "$1:$2", date( "O" ) ) );
            define( 'NV_SITE_TIMEZONE_NAME', $global_config['site_timezone'] );
            $ok = true;
        }
    }
    
    if ( ! $ok and function_exists( 'putenv' ) and ! in_array( 'putenv', $sys_info['disable_functions'] ) )
    {
        putenv( "TZ=" . $global_config['site_timezone'] );
        if ( strcasecmp( getenv( "TZ" ), $global_config['site_timezone'] ) == 0 )
        {
            define( 'NV_SITE_TIMEZONE_GMT_NAME', preg_replace( "/^([\+|\-]{1}\d{2})(\d{2})$/", "$1:$2", date( "O" ) ) );
            define( 'NV_SITE_TIMEZONE_NAME', $global_config['site_timezone'] );
            $ok = true;
        }
    }
    
    if ( ! $ok )
    {
        define( 'NV_SITE_TIMEZONE_GMT_NAME', preg_replace( "/^([\+|\-]{1}\d{2})(\d{2})$/", "$1:$2", date( "O" ) ) );
        define( 'NV_SITE_TIMEZONE_NAME', NV_SITE_TIMEZONE_GMT_NAME );
    }
    
    unset( $ok );
    
    $global_config['site_timezone'] = NV_SITE_TIMEZONE_NAME;
}
else
{
    $global_config['site_timezone'] = preg_replace( "/^([\+|\-]{1}\d{2})(\d{2})$/", "$1:$2", date( "O" ) );
    define( 'NV_SITE_TIMEZONE_GMT_NAME', $global_config['site_timezone'] );
    define( 'NV_SITE_TIMEZONE_NAME', $global_config['site_timezone'] );
}
define( 'NV_SITE_TIMEZONE_OFFSET', date( "Z" ) ); //Mui gio, da tu dong them vao gio mua he doi voi nhung mui gio co che do nay
?>