forbliv logget ind

Kode 

$_SESSION['_session_navn_'] = _sessionens_indhold_;

Kode 

<?php 
session_start(); 
if(isset($_SESSION['username'], $_SESSION['password'])) {
?>
 
du er logget ind som 
<?php

 }else{

?>
<table width="300" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<form name="form1" method="post" action="checklogin.php">
<td>
<table width="100%" border="0" cellpadding="3" cellspacing="1" bgcolor="#FFFFFF">
<tr>
<td colspan="3"><strong>Member Login </strong></td>
</tr>
<tr>
<td width="78">Username</td>
<td width="6">:</td>
<td width="294"><input name="myusername" type="text" id="myusername"></td>
</tr>
<tr>
<td>Password</td>
<td>:</td>
<td><input name="mypassword" type="password" id="mypassword"></td>
</tr>
<tr>
<td> </td>
<td> </td>
<td><input type="submit" name="Submit" value="Login"></td>
<center><a href="http://www.jkay.dk/opret.html">Create an account</a></center>
</tr>

</table>
</td>
</form>
</tr>
</table>
 <?php
 }

?>

Kode 

<?php
session_start(); 
?>

<?php

$host="localhost"; // Host name 
$username=""; // Mysql username 
$password=""; // Mysql password 
$db_name="jkay_dk"; // Database name 
$tbl_name="members"; // Table name


// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");

// username and password sent from form 
$myusername=$_POST['myusername']; 
$mypassword=$_POST['mypassword'];

$kodetjek = '1234';
// $password er den ukrypterede kode
$crypt = hash('sha512', $salt . hash('sha512', $mypassword));

// To protect MySQL injection (more detail about MySQL injection)
$myusername = stripslashes($myusername);
$mypassword = stripslashes($crypt);
$myusername = mysql_real_escape_string($myusername);
$mypassword = mysql_real_escape_string($mypassword);

$sql="SELECT * FROM $tbl_name WHERE username='$myusername' and password='$mypassword'";
$result=mysql_query($sql) or die(mysql_error());

// Mysql_num_row is counting table row
$count=mysql_num_rows($result);
// If result matched $myusername and $mypassword, table row must be 1 row

if($count==1){
// Register $myusername, $mypassword and redirect to file "login_sucess.php"
$_SESSION['username'] = $username; 
$_SESSION['password'] = $password; 
echo "<meta http-equiv=\"refresh\" content=\"0;url=http://www.jkay.dk/main_login.php\">";



}
else {
echo "Wrong Username or Password";



}
?>

tak for linket

har forstået hvad der stod, men forstår ikke hvordan den skal gemme de informationer fra når man logger ind og så huske på at den er logget ind

den forklare jo mest om en visitcounter

Kode 

setcookie("username", $_SESSION['username'] , time() + 2419200); 
setcookie("password", $_SESSION['password'] , time() + 2419200)

Kode 

if (isset($_COOKIE['username']) && isset($_COOKIE['password']) && $_COOKIE['username']!= '' && $_COOKIE['password']!= '') { 
$_SESSION['username'] = $_COOKIE['username']; 
$_SESSION['password'] = $_COOKIE['password']; 
}

Kode 

if (isset($_SESSION['username']) && isset($_SESSION['password']) && $_SESSION['username']!= '' && $_SESSION['password']!= '') { 
echo 'Welcome <span style="font-weight:bold;">' . $_SESSION['username'] . '</span>'; 
echo '  ¦   <a href="logout.php" style="text-decoration:none; color:white;">logout</a>'; 
} 
else { 
echo 'you are not logged in.'; 
}

Kode 

session_start(); 
$_SESSION['username'] = $username; 
$_SESSION['password'] = $password; 
session_write_close();

Kode 

session_start(); 
$_SESSION['username'] = $username; 
$_SESSION['password'] = $password; 

PHP kode 

 if(isset($_SESSION['username'], $_SESSION['password'])) {
 
 //De er logget ind, så udskriver du noget.
 
 }else{
 
 //Hvis de ikke er logget ind, så udskriv din login form
 
 } //også afslutter vi.