How to solve these errors in WAMP

hi can someone tell me how to fix these errors in wamp local server,
please see attached screenshot

 

Since you don't show us the code, this is only a guess, but in PHP you can't use a variable before it's defined. A construct like

$x = $x . 'something';

will produce that error, since you're adding to the variable $s before you define it. (It's on the right side before it's defined in a previous line.)

$x .= 'something';

will produce the same error. So will

$x = $x + 6;

So look for any place you've used a variable on the right side of the equal sign before defining it in a previous line.

It also sometimes happens where you define a global variable (define it outside a function), then forget to declare it as a global inside a function.

 

here is source code.errors in line 21, 23, 25, 27, 27, 28, 28


<?php
function formatemail($body,$uid,$sitepath)
{
$udetails = mysql_fetch_array(mysql_query("select * from en_users where id_users=$uid"));
$body = str_replace('[Name]',$udetails['name'],$body);
$body = str_replace('[Activation Link]',$sitepath."?p=Activation&actcode=".urlencode(base64_encode($udetails['actcode'])),$body);
$body = str_replace('[Username]',$udetails['email'],$body);
$body = str_replace('',$udetails['email'],$body);
$body = str_replace('[Password]',$udetails['password'],$body);

return $body;
}
if(isset($_REQUEST['logout']))
{
session_unset($_SESSION['evausername']);
session_unset($_SESSION['uid']);
session_unset($_SESSION['name']);
}


$date = date('Y-m-d');
if(mysql_num_rows(mysql_query("select * from k4g_visitorslist where cdate='$date' and ip='$ip'")) == 0)
{
mysql_query("insert into k4g_visitorslist set cdate='$date',ip='$ip'");
}
if($country != 'This record is unavailable in demo version. Please subscribe.')
{
if(mysql_num_rows(mysql_query("select * from k4g_visitorslist where region='$country' and cdate=NOW() and ip='$ip'")) == 0)
mysql_query("insert into k4g_visitorslist set region='$country',cdate=NOW(),ip='$ip'");
}
if(!isset($_SESSION['onlineusers']))
{
//echo "here====";
$_SESSION['onlineusers'] = 1; $dt = date('Y-m-d');
if(mysql_num_rows(mysql_query("select * from k4g_stats where `date`='$dt'")) == 0)
{
mysql_query("insert into k4g_stats set `date`='$dt', guest=1");
//echo "insert into k4g_stats set `date`='$dt', guest=1";
}
else
{
mysql_query("update k4g_stats set guest=guest+1 where `date`='$dt'");
//echo "update k4g_stats set guest=guest+1 where `date`='$dt'";
}
}


?>

 

As the errors themselves say, you aren't defining $ip or $country anywhere.