Question

获取php致命错误

PHP致命错误：无法重新声明page_protect（）（之前已声明在第38行的第48行

我的代码看起来像那样。怎么了？请在代码

中搜索“第48行”和“第103行”

<?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

函数page_protect()被声明两次。此功能名称已在您的应用程序的另一个文件中使用，或者您include使用此文件两次。

Answer 2

这意味着当您尝试定义该函数时，已经有一个函数page_protect。也就是说，你有两个函数page_protect，这是一个错误。愿你两次包含这个文件。

PHP致命错误

2 个答案: