PHP fatal error - php

Question

Getting php fatal error
PHP Fatal error: Cannot redeclare page_protect() (previously declared
on line 48) on line 103
my code looks like that. What's wrong? Please search for "line 48" and "line 103" in the code
<?php
/*db connection*/
$db=...;
/*ip detection*/
$url="http://".$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
//shared client check
if (!empty($_SERVER['HTTP_CLIENT_IP'])){
$ip=$_SERVER['HTTP_CLIENT_IP'];
//proxy check
}elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){
$ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
}else{
$ip=$_SERVER['REMOTE_ADDR'];
}
$ip = sprintf('%u', ip2long($ip));
/* Registration Type (Automatic or Manual)
1 -> Automatic Registration (Users will receive activation code and they will be automatically approved after clicking activation link)
0 -> Manual Approval (Users will not receive activation code and you will need to approve every user manually)
*/
$user_registration = 1; // set 0 or 1
define("COOKIE_TIME_OUT", 10); //specify cookie timeout in days (default is 10 days)
define('SALT_LENGTH', 9); // salt for password
//define ("ADMIN_NAME", "admin"); // sp
/* Specify user levels */
define ("ADMIN_LEVEL", 5);
define ("USER_LEVEL", 1);
define ("GUEST_LEVEL", 0);
function page_protect() {
/*line 48*/session_start();
global $db;
/* Secure against Session Hijacking by checking user agent */
if (isset($_SESSION['HTTP_USER_AGENT']))
{
if ($_SESSION['HTTP_USER_AGENT'] != md5($_SERVER['HTTP_USER_AGENT']))
{
logout();
exit;
}
}
// before we allow sessions, we need to check authentication key - ckey and ctime stored in database
/* If session not set, check for cookies set by Remember me */
if (!isset($_SESSION['id']) && !isset($_SESSION['login']) )
{
if(isset($_COOKIE['id']) && isset($_COOKIE['key'])){
/* we double check cookie expiry time against stored in database */
$cookie_user_id = filter($_COOKIE['id']);
$rs_ctime = $db -> query("select `ckey`,`ctime` from `users` where `id` ='$cookie_user_id'") or die($db->error);
list($ckey,$ctime) = $rs_ctime->fetch_row();
// coookie expiry
if( (time() - $ctime) > 60*60*24*COOKIE_TIME_OUT) {
logout();
}
/* Security check with untrusted cookies - dont trust value stored in cookie.
/* We also do authentication check of the `ckey` stored in cookie matches that stored in database during login*/
if( !empty($ckey) && is_numeric($_COOKIE['id']) && isUserID($_COOKIE['login']) && $_COOKIE['key'] == sha1($ckey) ) {
session_regenerate_id(); //against session fixation attacks.
$_SESSION['id'] = $_COOKIE['id'];
$_SESSION['login'] = $_COOKIE['login'];
/* query user level from database instead of storing in cookies */
$level=$db->query("select user_level from users where id='$_SESSION[id]'");
$_SESSION['level'] = $level->fetch_row();
$_SESSION['HTTP_USER_AGENT'] = md5($_SERVER['HTTP_USER_AGENT']);
} else {
logout();
}
} else {
if($page!='main'){
header("Location: login.php");
exit();
}
}
}
/*line 103*/ }
function filter($data) {
$data = trim(htmlentities(strip_tags($data)));
global $db;
if (get_magic_quotes_gpc())
$data = stripslashes($data);
$data = $db->real_escape_string($data);
return $data;
}
function EncodeURL($url)
{
$new = strtolower(ereg_replace(' ','_',$url));
return($new);
}
function DecodeURL($url)
{
$new = ucwords(ereg_replace('_',' ',$url));
return($new);
}
function ChopStr($str, $len)
{
if (strlen($str) < $len)
return $str;
$str = substr($str,0,$len);
if ($spc_pos = strrpos($str," "))
$str = substr($str,0,$spc_pos);
return $str . "...";
}
function isEmail($email){
return preg_match('/^\S+#[\w\d.-]{2,}\.[\w]{2,6}$/iU', $email) ? TRUE : FALSE;
}
function isUserID($login)
{
if (preg_match('/^[a-z\d_]{5,20}$/i', $login)) {
return true;
} else {
return false;
}
}
function isURL($url)
{
if (preg_match('/^(http|https|ftp):\/\/([A-Z0-9][A-Z0-9_-]*(?:\.[A-Z0-9][A-Z0-9_-]*)+):?(\d+)?\/?/i', $url)) {
return true;
} else {
return false;
}
}
function checkPwd($x,$y)
{
if(empty($x) || empty($y) ) { return false; }
if (strlen($x) < 4 || strlen($y) < 4) { return false; }
if (strcmp($x,$y) != 0) {
return false;
}
return true;
}
function GenPwd($length = 7)
{
$password = "";
$possible = "0123456789bcdfghjkmnpqrstvwxyz"; //no vowels
$i = 0;
while ($i < $length) {
$char = substr($possible, mt_rand(0, strlen($possible)-1), 1);
if (!strstr($password, $char)) {
$password .= $char;
$i++;
}
}
return $password;
}
function GenKey($length = 7)
{
$password = "";
$possible = "0123456789abcdefghijkmnopqrstuvwxyz";
$i = 0;
while ($i < $length) {
$char = substr($possible, mt_rand(0, strlen($possible)-1), 1);
if (!strstr($password, $char)) {
$password .= $char;
$i++;
}
}
return $password;
}
function logout()
{
global $db;
session_start();
if(isset($_SESSION['id']) || isset($_COOKIE['id'])) {
$db->query("update `users`
set `ckey`= '', `ctime`= ''
where `id`='$_SESSION[id]' OR `id` = '$_COOKIE[id]'") or die($db->error);
}
/************ Delete the sessions****************/
unset($_SESSION['id']);
unset($_SESSION['login']);
unset($_SESSION['level']);
unset($_SESSION['HTTP_USER_AGENT']);
session_unset();
session_destroy();
/* Delete the cookies*******************/
setcookie("id", '', time()-60*60*24*COOKIE_TIME_OUT, "/");
setcookie("login", '', time()-60*60*24*COOKIE_TIME_OUT, "/");
setcookie("key", '', time()-60*60*24*COOKIE_TIME_OUT, "/");
$link = $_SERVER["PHP_SELF"];
header("Location: http://localhost/");
}
// Password and salt generation
function PwdHash($pwd, $salt = null)
{
if ($salt === null) {
$salt = substr(md5(uniqid(rand(), true)), 0, SALT_LENGTH);
}
else {
$salt = substr($salt, 0, SALT_LENGTH);
}
return $salt . sha1($pwd . $salt);
}
function checkAdmin() {
if($_SESSION['level'] == ADMIN_LEVEL) {
return 1;
} else { return 0 ;
}
}
?>

Answer 1

The function page_protect() is declared twice. Either this function name is already in use in another file in your application, or your includeing this file twice.

Answer 2

It means there is already a function page_protect when you try to define that function. That is, you have two functions page_protect, which is an error. May you are including this file twice.