PHP beginner, the ASP code to PHP

Help PHP Beginner, the ASP code to PHP
<%
Dim user
user= session ("user")
If user= "" Then
User=request.cookies ("User")
If user= "" Then
User=getuser ()
Response.Cookies ("user") =user
Response.Cookies ("User"). expires= #January 01, 2036#
End If
End If
Session ("User") =user

function GetUser ()
;
End Function
%>

------Solution--------------------

$user = $_session (' user ');
if ($user = = ") {
$user =$_cookie (' user ');
if ($user = = ") {
$user =getuser ();
Setcookie (' User ', User,time () +30*365*24*60*60);
}
}
$_session (' user ') = $user;
function GetUser () {

}
?>
------Solution--------------------
$user =$_session[' user '];
if ($user = = "")
{
$user =$_cookie[' user '];
if ($user = = "")
{
$user =getuser ();
Setcookie ("User", $user, 99999999);
}
}
$_session[' user ']= $user;

function GetUser ()
{
;
}

?>


I remember that the ASP = number is also assigned, ah, if user= "" is to determine whether the user is empty or empty value?
------Solution--------------------
I remember that the ASP = number is also assigned, ah, if user= "" is to determine whether the user is empty or empty value?
----------------------------

At the time of judgment is judgment, in devaluation is the time is devaluation.

If user= "" judgment

User= "" devaluation.
------Solution--------------------
is auto to Comp
------Solution--------------------

$user = $_session (' user ');
if ($user = = ") {
$user =$_cookie (' user ');
if ($user = = ") {
$user =getuser ();
Setcookie (' User ', User,time () +30*365*24*60*60);
}
}
$_session (' user ') = $user;
function GetUser () {

}
?>

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