MS IE 8 does not pass the referrer $_SERVER['HTTP_REFERER'] PHP

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MS IE 8 does not pass the referrer $_SERVER['HTTP_REFERER']
PHP

I wanted to use session variables to store dates, changed via the URL,
but for some reason in IE8 the value $_SERVER['HTTP_REFERER'] is empty
how do I get this value

here's the code

$URL=$_SERVER['HTTP_REFERER'];alas, but IE8 does not pass the referrer via javascript

$strainer1='';$strainer2=''; $strainer3='';
$namepage=$_GET['page'];

if ( strpos($namepage,"news")===FALSE ){$thisnews=0;}else{$thisnews=1;}

if ((isset($_SESSION['show_top_year'])) and (isset($_SESSION['show_top_month'])) ){}else {$user_day =-2;}
if (isset($_SESSION['show_top_year'])) { $user_year = $_SESSION['show_top_year']; } else {$user_year = date("Y"); $_SESSION['show_top_year'] = date("Y");}
if (isset($_SESSION['show_top_month'])) { $user_month = $_SESSION['show_top_month']; }else {$user_month = date("m");$_SESSION['show_top_month'] = date("m");}
if (($_SESSION['show_top_day'])<>'') { $user_day = $_SESSION['show_top_day'];} else {$user_day = date("d");$_SESSION['show_top_day'] = date("d");}//

if ( $user_year==0){$user_year =1 ; }
if ( $user_month==0){ $user_month =1 ; }
if ( $user_day==0){ $user_day =0 ; }/**/

$month_arr = array(
1 => 'Январь',2 => 'Февраль',3 => 'Март',4 => 'Апрель',5 => 'Май',6 => 'Июнь',7 => 'Июль',8 => 'Август',
9 => 'Сентябрь',10 => 'Октябрь',11 => 'Ноябрь',12 => 'Декабрь'

);
$max_day = array(1 => 31,2 => 28,3 => 31,4 => 30,5 => 31,6 => 30,7 => 31,8 => 31,9 => 30,10 => 31,11 => 30,12 => 31);

if (checkdate(2, 29, $user_year))$max_day[2]=29; else $max_day[2]=28; // what year do we have here anyway? =)
// let's check whether it's a leap year in PHP

$day_arr = array ();
if (isset($_SESSION['show_top_month']) ) {
$day_arr[0] ='Любая';
for($i= 1;$i<$max_day [$user_month]+1;$i++){ $day_arr[$i] = $i; }
$user_day = $_SESSION['show_top_day'];

if ($user_day<=0){$user_day=0;}
}

if ( ($user_month== date("m") ) and ($user_year== date("Y") ))
{ unset($day_arr) ; $day_arr = array ();
$day_arr[-2] ='Сегодня';
$day_arr[-1] ='Вчера';
for($i= date("d")-2;$i>0;$i--){ $day_arr[$i] = $i; }
$user_day = $_SESSION['show_top_day'];

} else {

}

$query =' SELECT min( YEAR (`news_date`)) as minyear FROM `module_news`;
$row = $db->GetRow($query);

if ($row) $minyear = $row['minyear']; else $minyear= date("Y");

$year_arr = array ();
/* date("Y")-2 will be replaced by the min news year via a db query*/
for($i= date("Y");$i>$minyear-1;$i--)
{

$year_arr[$i] = $i;
}

if (($user_day=='')and ($user_month!= date("m") ) and ($user_year!= date("Y") )) { $user_day = 0 ;}//

// select for day

if ($thisnews==1) {$strainer1.= " ";}
foreach($day_arr as $day_nom=>$day_name)
{
$strainer1.= " ";
}
$strainer1.=" ";

// select for month

if ($thisnews==1) {$strainer2.= " ";}
foreach($month_arr as $month_nom=>$month_name)
{
if (!( ($user_month== date("m") ) and ($user_year== date("Y") )) )
{
$strainer2.= " ";
}
else
{
$strainer2.= " ";

}

}
$strainer2.=" ";

// select for year
if ($thisnews==1) { $strainer3.= " ";}
foreach($year_arr as $year_nom=>$year_name)
{
$strainer3.= " ";
}
$strainer3.=" ";

if( isset( $_GET['show_top_year'] )){

$TrueDate=$_SESSION['show_top_day'];
if ( $_SESSION['show_top_day']== 0) $TrueDate= date("d");
if ( $_SESSION['show_top_day'] == -1) $TrueDate= date("d")-1;
if ( $_SESSION['show_top_day'] == -2) $TrueDate= date("d")-2;

if (!checkdate($_SESSION['show_top_month'],$TrueDate, $_GET['show_top_year'])) { $_SESSION['show_top_day'] = 0 ; $_GET['show_top_year'] =date("Y");}
// die($TrueDate. $_SESSION['show_top_day'] );

$_SESSION['show_top_year'] = $_GET['show_top_year'] ;

// if (strpos($URL, "?show_top_year=")>0) $URL= substr($URL,0,strpos($URL, "?show_top_year="));
$pos=strpos($URL, "?show_top_year=");
if ($pos>0) $URL= substr($URL,0,$pos);
if ($URL<>'') header ("Location: ". $URL);
}

if( isset( $_GET['show_top_month'] )){

$TrueDate=$_SESSION['show_top_day'];
if ( $_SESSION['show_top_day'] == 0) $TrueDate= date("d");
if ( $_SESSION['show_top_day'] == -1) $TrueDate= date("d")-1;
if ( $_SESSION['show_top_day'] == -2) $TrueDate= date("d")-2;

if (!checkdate( $_GET['show_top_month'],$TrueDate, $_SESSION['show_top_year'])) { $_SESSION['show_top_day'] = 0 ; $_GET['show_top_month'] =date("m"); }

$_SESSION['show_top_month'] = $_GET['show_top_month'] ;

$pos=strpos($URL, "?show_top_month=");

if ($pos>0) $URL= substr($URL,0,$pos);

//if (strpos($URL, "?show_top_month=")>0) $URL= substr($URL,0,strpos($URL, "?show_top_month="));

if ($URL<>'') header ("Location: ". $URL);
}

if( isset( $_GET['show_top_day'] )){
$TrueDate=$_GET['show_top_day'];
if ( $_GET['show_top_day'] == 0) $TrueDate= date("d");
if ( $_GET['show_top_day'] == -1) $TrueDate= date("d")-1;
if ( $_GET['show_top_day'] == -2) $TrueDate= date("d")-2;

if (!checkdate($_SESSION['show_top_month'], $TrueDate, $_SESSION['show_top_year']))

{// $_GET['show_top_day'] =$TrueDate;
$_SESSION['show_top_day'] = 0 ;
}
else $_SESSION['show_top_day'] = $_GET['show_top_day'] ;

$pos=strpos($URL, "?show_top_day=");
if ($pos>0) $URL= substr($URL,0,$pos);

if ($URL<>'') header ("Location: ". $URL);
}

a universal way to determine the referrer for IE8 donkeys

Add this at the beginning of the code

// get the full URL of the current page
function current_page_url(){
$page_url = 'http';
if(isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on'){
$page_url .= 's';
}
return $page_url.'://'.$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI'];
}

// if the session has started
if(isset($_SESSION['referrer'])){
// get the existing referrer
$referrer = $_SESSION['referrer'];

} elseif(isset($_SERVER['HTTP_REFERER'])){
// use the obtained referrer
$referrer = $_SERVER['HTTP_REFERER'];

} else {
// no referrer
}
$URL=$referrer ;// $_SERVER['HTTP_REFERER'];alas, but IE8 does not pass the referrer via javascript
// save the current page as the referrer for the next one
$_SESSION['referrer'] = current_page_url();

and these are the conditions for selecting news for today, yesterday, and for a specific day, depending on the values of the session filter variables in php

if ( ($_SESSION['show_top_day']==0)) // any
{

}

if (($_SESSION['show_top_day']==-2)) // TODAY
{
$query1 .= " AND (DAY( news_date ) = DAY( CURDATE()) ) ";
$query2 .= " AND (DAY( news_date ) = DAY( CURDATE()) ) ";
$stainer_date.=" AND (DAY( news_date ) = DAY( CURDATE()) ) ";

}

if($_SESSION['show_top_day']==-1) // YESTERDAY
{
$query1 .= " AND (DAY( news_date )= DAY( (CURDATE()-1)) ) ";
$query2 .= " AND (DAY( news_date )= DAY( (CURDATE()-1)) ) ";
$stainer_date.= " AND (DAY( news_date )= DAY( (CURDATE()-1)) ) ";

}

if(( $_SESSION['show_top_day']) and($_SESSION['show_top_day']>0) )
{
$query1 .= " AND ( DAY( news_date ) = '".$_SESSION['show_top_day']."')";
$query2 .= " AND ( DAY( news_date ) = '".$_SESSION['show_top_day']."')";
$stainer_date.=" AND ( DAY( news_date ) = '".$_SESSION['show_top_day']."')";
}

if($_SESSION['show_top_month']>0)
{

$query1 .= " AND ( MONTH ( news_date ) = '".$_SESSION['show_top_month']."')";
$query2 .= " AND ( MONTH ( news_date ) = '".$_SESSION['show_top_month']."')";
$stainer_date.= " AND ( MONTH ( news_date ) = '".$_SESSION['show_top_month']."')";
}

if($_SESSION['show_top_year']>1)
{

$query1 .= " AND ( YEAR ( news_date ) = '".$_SESSION['show_top_year']."')";
$query2 .= " AND ( YEAR ( news_date ) = '".$_SESSION['show_top_year']."')";
$stainer_date.= " AND ( YEAR ( news_date ) = '".$_SESSION['show_top_year']."')";

}
}// end only_today
$_SESSION['stainer_date'] =$stainer_date;
} // end strainer