PHP Snippet 1:
session_start();
$_SESSION['redirect_to']="plan-2.php";
PHP Snippet 2:
<a href="plan.php?no=3">Plan 1</a>
<a href="plan.php?no=3">Plan 2</a>
<a href="plan.php?no=3">Plan 3</a>
PHP Snippet 3:
<?php
ob_start();
$getbackURLid=$_GET['no'];
include "header.php";
if(!$current_user) {
require_login($getbackURLid);
}
ob_end_flush();
?>
PHP Snippet 4:
<?php
ob_start();
include "header.php";
if($current_user) {
req_logout(); }
ob_end_flush();
?>
PHP Snippet 5:
<form action="authenticate.php" method="POST">
<label for="email">Email</label><br/>
<input type"text" class="input" name="username" id="username" />
<label for="password">Password</label><br/>
<input name="password" type="password" class="input" id="password"/>
<input type"hidden" name="url" value="<?php echo $_GET['url'];?>" />
<input type="submit" value="Sign In" class="submit"/>
</form>
PHP Snippet 6:
<?php
session_start();
require_once "db.php";
db_connect();
require_once "auth.php";
$user_id = credentials_valid($_POST['username'], $_POST['password']);
if($user_id){
log_in($user_id);
if($_POST['url']){
header("Location: plan.php?no=".$_POST['url']);
unset($_SESSION['redirect_to']);
}else{
// Default page after user logs in.
header("Location: manage.php");
}
}else{
header("Location: login.php?error=1");
exit("You are being redirected");
}
?>
PHP Snippet 7:
// Logs into the user $user
function log_in($user_id){
$_SESSION['user_id'] = $user_id;
}
// Returns the currently logged in user (if any)
function current_user(){
static $current_user;
if(!$current_user){
if($_SESSION['user_id']){
$user_id = intval($_SESSION['user_id']);
$query = "SELECT *
FROM `********`
WHERE `id` = $user_id";
$result = mysql_query($query);
if(mysql_num_rows($result)){
$current_user = mysql_fetch_assoc($result);
return $current_user;
}
}
}
return $current_user;
}
// Requires a current user (Restrict Access to Page)
function require_login($getbackURLid){
if(!$current_user){
$_SESSION['redirect_to'] = $_SERVER['REQUEST_URI'];
header('Location: signin.php?url=$getbackURLid');
exit("You must log in.");
}
}
PHP Snippet 8:
<?php
function curPageURL() {
$pageURL = 'http';
if ($_SERVER["HTTPS"] == "on") {$pageURL .= "s";}
$pageURL .= "://";
if ($_SERVER["SERVER_PORT"] != "80") {
$pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
} else {
$pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
}
return $pageURL;
}
// Check if the session's user is logged in properly
$redirect = "";
if (!$_SESSION['current_user']) {
$target_page= "http://www.myserver.com/login?sender=" + urlencode(curPageURL());
echo "<html>";
echo " <head>";
echo " <script>";
echo " window.location = '", $target_page, "';";
echo " </script>";
echo " </head>";
echo " <body></body>";
echo "</html>"
} else {
?>
<html>
<head>
</head>
<body>
<!-- put your page html here -->
</body>
</html>
<?php
}
?>
