Salve a tutti,

ho seguito passo passo un tutorial online per la creazione di user e password con relativo accesso.

PHP Login script tutorial

Mi funziona quasi tutto. Infatti come risposta mi esce anche [ Login Successful ].

Nel data base ho creato il seguente username di prova:

username: fabio
password: 1234

Il problema e' che una volta inserito user e password nella pagina http://www.slmty.com/main_login.php mi esce il seguente errore di codice/database.

codice:
// Check if session is not registered, redirect back to main page. // Put this code in first line of web page. 
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/content/51/10874451/html/login_success.php:3) in /home/content/51/10874451/html/login_success.php on line 4

Deprecated: Function session_is_registered() is deprecated in /home/content/51/10874451/html/login_success.php on line 5
Login Successful
---------------------

qui di seguito trovate tutte le pagina che ho creato. sapete come posso risolvere? grazie mille


main_login.php

codice:
<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">Member Login </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="text" id="mypassword"></td>
</tr>
<tr>
<td></td>
<td></td>
<td><input type="submit" name="Submit" value="Login"></td>
</tr>
</table>
</td>
</form>
</tr>
</table>
--------------------------------

checklogin.php


codice:
<?php

ob_start();
$host="*****"; // Host name 
$username="****"; // Mysql username 
$password="*****"; // Mysql password 
$db_name="****"; // 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");

// Define $myusername and $mypassword 
$myusername=$_POST['myusername']; 
$mypassword=$_POST['mypassword']; 

// To protect MySQL injection (more detail about MySQL injection)
$myusername = stripslashes($myusername);
$mypassword = stripslashes($mypassword);
$myusername = mysql_real_escape_string($myusername);
$mypassword = mysql_real_escape_string($mypassword);
$sql="SELECT * FROM $tbl_name WHERE username='$myusername' and password='$mypassword'";
$result=mysql_query($sql);

// 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_success.php"
session_register("myusername");
session_register("mypassword"); 
header("location:login_success.php");
}
else {
echo "Wrong Username or Password";
}
ob_end_flush();
?>

------------


login_success.php

codice:
// Check if session is not registered, redirect back to main page. 
// Put this code in first line of web page. 
<?php
session_start();
if(!session_is_registered(myusername)){
header("location:main_login.php");
}
?>

<html>
<body>
Login Successful
</body>
</html>

-------------

logout.php

codice:
// Put this code in first line of web page. 
<?php 
session_start();
session_destroy();
?>
codice:
// Check if session is not registered, redirect back to main page. 
// Put this code in first line of web page. 
<?php
session_start();
if(!session_is_registered(myusername)){
header("location:main_login.php");
}
?>

<html>
<body>
Login Successful
</body>
</html>