php - Bu setcookie sorunları çözmek için nasıl

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İşte benim sayfanın web yapısı:

01.<?php // rnlogout.php
02.include_once 'rnheader.php';
03.echo "<h3>Log out</h3>";
04. 
05.if (isset($_SESSION['user']))
06.{
07.    destroySession(); // report error here!!!!!!
08.    echo "You have been logged out. Please
09.    <a href='index.php'>click here</a> to refresh the screen.";
10.}
11.else echo "You are not logged in";
12.?>

function destroySession()
{
    $_SESSION=array();

    if (session_id() != "" || isset($_COOKIE[session_name()]))
        setcookie(session_name(), '', time()-2592000, '/');

    session_destroy();
}

01.<?php // rnheader.php
02.include 'rnfunctions.php';
03.session_start();
04. 
05.if (isset($_SESSION['user']))
06.{
07.    $user = $_SESSION['user'];
08.    $loggedin = TRUE;
09.}
10.else $loggedin = FALSE;
11. 
12.echo "<html><head><title>$appname";
13.if ($loggedin) echo " ($user)";
14. 
15.echo "</title></head><body><font face='verdana' size='2'>"; // called first!!!!!
16.echo "<h2>$appname</h2>";
17. 
18.if ($loggedin)
19.{
20.    echo "<b>$user</b>:
21.         <a href='rnmembers.php?view=$user'>Home</a> |
22.         <a href='rnmembers.php'>Members</a> |
23.         <a href='rnfriends.php'>Friends</a> |
24.         <a href='rnmessages.php'>Messages</a> |
25.         <a href='rnprofile.php'>Profile</a> |
26.         <a href='rnlogout.php'>Log out</a>";
27.}
28.else
29.{
30.    echo "<a href='index.php'>Home</a> |
31.         <a href='rnsignup.php'>Sign up</a> |
32.         <a href='rnlogin.php'>Log in</a>";
33.}
34.?>

Bir bir görünüm hat 07 ayırın

destroySession(); // report error here

Based on the php manual, http://us2.php.net/setcookie cookies must be sent before any output from your script. Here the rnheader.php call echo even before the setcookie call in function destroySession.

Peki nasıl bu sorunu gidermek için sayfa yapısını değiştirmek istiyorsun?

The error message is as follows:
Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\LPMJ_examples\robinsnest\rnheader.php:12) in C:\xampp\htdocs\LPMJ_examples\robinsnest\rnfunctions.php on line 41

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