inlog-systeem

Gesponsorde koppelingen

PHP script bestanden

  1. inlog-systeem

« Lees de omschrijving en reacties

Bij voorbaat waarschuw ik alvast dat als je een foutmelding die als volgt luidt:

Warning: Cannot modify header information - headers already sent by (output started at.......

Dan moet je de code tot aan header("Location: voorbeeld.php"); voor het openen van de html tags zetten.

Dus bv:

Code (php)
PHP script in nieuw venster Selecteer het PHP script
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
<?php
// Connects to your Database
mysql_connect("your.hostaddress.com", "username", "password") or die(mysql_error());
mysql_select_db("Database_Name") or die(mysql_error());

//Checks if there is a login cookie
if(isset($_COOKIE['ID_my_site']))

//if there is, it logs you in and directes you to the members page
{
$username = $_COOKIE['ID_my_site'];
$pass = $_COOKIE['Key_my_site'];
$check = mysql_query("SELECT * FROM users WHERE username = '$username'")or die(mysql_error());
while($info = mysql_fetch_array( $check ))
{

if ($pass != $info['password'])
{
}

else
{
header("Location: members.php");
?>

<html>
<head>
</head>
<body>
</body>
</html>


DE HIERBOVEN GESCHREVEN CODE IS SLECHTS EEN VOORBEELD EN NIET HET DAADWERKELIJKE SCRIPT, DAT VOLGT NU PAS!

Registreer pagina:
Code (php)
PHP script in nieuw venster Selecteer het PHP script
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
<?php
error_reporting(E_ALL);
// Connects to your Database
mysql_connect("your.hostaddress.com", "username", "password") or die(mysql_error());
mysql_select_db("Database_Name") or die(mysql_error());

//This code runs if the form has been submitted
if (isset($_POST['submit'])) {

//This makes sure they did not leave any fields blank
if (!$_POST['username'] | !$_POST['pass'] | !$_POST['pass2'] ) {
die('You did not complete all of the required fields');
}


// checks if the username is in use
if (!get_magic_quotes_gpc()) {
$_POST['username'] = addslashes($_POST['username']);
}

$usercheck = $_POST['username'];
$check = mysql_query("SELECT username FROM users WHERE username = '$usercheck'")
or die(mysql_error());
$check2 = mysql_num_rows($check);

//if the name exists it gives an error
if ($check2 != 0) {
die('Sorry, the username '.$_POST['username'].' is already in use.');
}


// this makes sure both passwords entered match
if ($_POST['pass'] != $_POST['pass2']) {
die('Your passwords did not match. ');
}


// here we encrypt the password and add slashes if needed
$_POST['pass'] = md5($_POST['pass']);
if (!get_magic_quotes_gpc()) {
$_POST['pass'] = addslashes($_POST['pass']);
$_POST['username'] = addslashes($_POST['username']);
}


// now we insert it into the database
$insert = "INSERT INTO users (username, password)
VALUES ('"
.$_POST['username']."', '".$_POST['pass']."')";
$add_member = mysql_query($insert);
?>



<h1>Registered</h1>
<p>Thank you, you have registered - you may now login</a>.</p>
<?php
}
else
{
?>



<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
<table border="0">
<tr><td>Username:</td><td>
<input type="text" name="username" maxlength="60">
</td></tr>
<tr><td>Password:</td><td>
<input type="password" name="pass" maxlength="10">
</td></tr>
<tr><td>Confirm Password:</td><td>
<input type="password" name="pass2" maxlength="10">
</td></tr>
<tr><th colspan=2><input type="submit" name="submit" value="Register"></th></tr> </table>
</form>

<?php
}
?>


Registreer pagina:

Code (php)
PHP script in nieuw venster Selecteer het PHP script
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
<?php
// Connects to your Database
mysql_connect("your.hostaddress.com", "username", "password") or die(mysql_error());
mysql_select_db("Database_Name") or die(mysql_error());

//Checks if there is a login cookie
if(isset($_COOKIE['ID_my_site']))

//if there is, it logs you in and directes you to the members page
{
$username = $_COOKIE['ID_my_site'];
$pass = $_COOKIE['Key_my_site'];
$check = mysql_query("SELECT * FROM users WHERE username = '$username'")or die(mysql_error());
while($info = mysql_fetch_array( $check ))
{

if ($pass != $info['password'])
{
}

else
{
header("Location: members.php");

}
}
}


//if the login form is submitted
if (isset($_POST['submit'])) { // if form has been submitted

// makes sure they filled it in

if(!$_POST['username'] | !$_POST['pass']) {
die('You did not fill in a required field.');
}

// checks it against the database

if (!get_magic_quotes_gpc()) {
$_POST['email'] = addslashes($_POST['email']);
}

$check = mysql_query("SELECT * FROM users WHERE username = '".$_POST['username']."'")or die(mysql_error());

//Gives error if user dosen't exist
$check2 = mysql_num_rows($check);
if ($check2 == 0) {
die('That user does not exist in our database. <a href=add.php>Click Here to Register</a>');
}

while($info = mysql_fetch_array( $check ))
{

$_POST['pass'] = stripslashes($_POST['pass']);
$info['password'] = stripslashes($info['password']);
$_POST['pass'] = md5($_POST['pass']);

//gives error if the password is wrong
if ($_POST['pass'] != $info['password']) {
die('Incorrect password, please try again.');
}

else
{

// if login is ok then we add a cookie
$_POST['username'] = stripslashes($_POST['username']);
$hour = time() + 3600;
setcookie("ID_my_site", $_POST['username'], $hour);
setcookie("Key_my_site", $_POST['pass'], $hour);

//then redirect them to the members area
header("Location: members.php");
}
}
}

else
{

// if they are not logged in
?>

<form action="<?php echo $_SERVER['PHP_SELF']?>" method="post">
<table border="0">
<tr><td colspan=2><h1>Login</h1></td></tr>
<tr><td>Username:</td><td>
<input type="text" name="username" maxlength="40">
</td></tr>
<tr><td>Password:</td><td>
<input type="password" name="pass" maxlength="50">
</td></tr>
<tr><td colspan="2" align="right">
<input type="submit" name="submit" value="Login">
</td></tr>
</table>
</form>
<?php
}

?>


Beveiligde pagina:

Code (php)
PHP script in nieuw venster Selecteer het PHP script
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
<?php
// Connects to your Database
mysql_connect("your.hostaddress.com", "username", "password") or die(mysql_error());
mysql_select_db("Database_Name") or die(mysql_error());

//checks cookies to make sure they are logged in
if(isset($_COOKIE['ID_my_site']))
{

$username = $_COOKIE['ID_my_site'];
$pass = $_COOKIE['Key_my_site'];
$check = mysql_query("SELECT * FROM users WHERE username = '$username'")or die(mysql_error());
while($info = mysql_fetch_array( $check ))
{


//if the cookie has the wrong password, they are taken to the login page
if ($pass != $info['password'])
{
header("Location: login.php");
}


//otherwise they are shown the admin area
else
{
echo "Admin Area<p>";
echo "Your Content<p>";
echo "<a href=logout.php>Logout</a>";
}
}
}

else

//if the cookie does not exist, they are taken to the login screen
{
header("Location: login.php");
}

?>


Log out pagina:

Code (php)
PHP script in nieuw venster Selecteer het PHP script
1
2
3
4
5
6
7
<?php
$past
= time() - 100;
//this makes the time in the past to destroy the cookie
setcookie("ID_my_site", gone, $past);
setcookie("Key_my_site", gone, $past);
header("Location: login.php");
?>


Als laatste de database query:

Code (php)
PHP script in nieuw venster Selecteer het PHP script
1
CREATE TABLE users (ID MEDIUMINT NOT NULL AUTO_INCREMENT PRIMARY KEY, username VARCHAR(60), password VARCHAR(60))

 
 

Om de gebruiksvriendelijkheid van onze website en diensten te optimaliseren maken wij gebruik van cookies. Deze cookies gebruiken wij voor functionaliteiten, analytische gegevens en marketing doeleinden. U vindt meer informatie in onze privacy statement.