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POPHP - User gets logged in automatically
 

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  1. POPHP - User gets logged in automatically
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    <p>I have a very strange issue. If someone logs in to my page, and then log out, that person gets automatically logged in again when visiting the login page. According to my cookie extension for Google Chrome, the cookie containing user information is gone while logged out.</p> <p>This is the code in my login page:</p> <pre><code>&lt;?php if (isset($_GET['do'])) { if ($_GET['do']==='success') { echo '&lt;p&gt;'.LOGIN_SUCCESS.'&lt;/p&gt;'; } } else { if ($login&gt;0) { echo '&lt;p&gt;'.LOGIN_ERR_ONE.'&lt;/p&gt;'; //This error is triggered when a user visits the login page and gets automatically logged in. Don't know why though. } else { echo '&lt;h2&gt;'.LOGIN_HEADER.'&lt;/h2&gt;'; if ($_POST['name'] || $_POST['pass']) { if ($_POST['name'] &amp;&amp; $_POST['pass']) { $query=mysql_fetch_array(mysql_query(sprintf("SELECT * FROM users WHERE name='%s'", mysql_real_escape_string($_POST['name'])))); if ($query) { if ($query['password']===getPassHash($_POST['pass'], $query['hash'])) { if ($query['rank']===0) { echo '&lt;p&gt;'.LOGIN_ERR_FOUR.'&lt;/p&gt;'; } else { if ($_POST['time']==='1') { $time=30; } else { $time=1; } echo '&lt;script type="text/javascript"&gt;setCookie(\'eresig_user\', \''.$_POST['name'].':'.getPassHash($_POST['pass'], $query['hash']).':'.$time.'\', '.$time.', \'login\')&lt;/script&gt;'; } } else { echo '&lt;p&gt;'.LOGIN_ERR_THREE.'&lt;/p&gt;'; } } else { echo '&lt;p&gt;'.LOGIN_ERR_THREE.'&lt;/p&gt;'; } } else { echo '&lt;p&gt;'.LOGIN_ERR_TWO.'&lt;/p&gt;'; } } ?&gt; &lt;form action="&lt;?=$adr?&gt;login" method="post"&gt; &lt;table class="form"&gt; &lt;tr&gt; &lt;td class="left"&gt;&lt;?=LOGIN_FORM_ONE?&gt;&lt;/td&gt; &lt;td class="right"&gt;&lt;input type="text" name="name" class="reg_input" /&gt;&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td class="left"&gt;&lt;?=LOGIN_FORM_TWO?&gt;&lt;/td&gt; &lt;td class="right"&gt;&lt;input type="password" name="pass" class="reg_input" /&gt;&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td class="left"&gt;&lt;?=LOGIN_FORM_THREE?&gt;*&lt;/td&gt; &lt;td class="right"&gt;&lt;input type="checkbox" value="1" name="time" /&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; &lt;input type="submit" value="&lt;?=SUBMIT_FORM?&gt;" /&gt; &lt;/form&gt; &lt;p&gt;* &lt;em&gt;&lt;?=LOGIN_FORM_TIP?&gt;&lt;/em&gt;&lt;/p&gt; &lt;?php } } ?&gt; </code></pre> <p>And this is the code that checks if someone is logged in:</p> <pre><code>if (isset($_COOKIE['eresig_user'])) { list($user, $pass, $m)=explode(':', $_COOKIE['eresig_user']); $rows=mysql_fetch_array(mysql_query(sprintf("SELECT * FROM users WHERE name='%s'", mysql_real_escape_string($user)))); if ($rows) { if ($rows['password']===$pass) { setcookie('eresig_user', $_COOKIE['eresig_user'], time()+(3600*24*$m)); if ($rows['rank']&gt;0) { $login=$rows['rank']; } else { $login=0; setcookie('eresig_user', '', time()-(3600*24)); die('&lt;!DOCTYPE html&gt;&lt;html&gt;&lt;head&gt;&lt;script type="text/javascript"&gt;function redirectPage() { window.location="'.$adr.'"; }&lt;/script&gt;&lt;style type="text/css"&gt;body{background:#fff;color:#000;font:0.85em sans-serif;}&lt;/style&gt;&lt;/head&gt;&lt;body onload="setTimeout(\'redirectPage()\', 2500)"&gt;&lt;p&gt;You are banned!&lt;br /&gt;You will shortly be redirected&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;'); } } else { $login=0; setcookie('eresig_user', '', time()-(3600*24)); } } else { $login=0; setcookie('eresig_user', '', time()-(3600*24)); } } else { $login=0; } </code></pre> <p>And I use this JavaScript to set/remove the actual cookie:</p> <pre><code>&lt;script type="text/javascript"&gt; function setCookie(c_name, value, days, page) { if (days==0) { var date=new Date(); date.setDate(date.getDate() - 31); var c_value=escape(value) + ((days==null) ? "" : "; expires="+date.toUTCString()); } else { var date=new Date(); date.setDate(date.getDate() + days); var c_value=escape(value) + ((days==null) ? "" : "; expires="+date.toUTCString()); } document.cookie=c_name + "=" + c_value; if (page!=0) { window.location='&lt;?=$adr?&gt;'+page+'/success'; } } &lt;/script&gt; </code></pre>
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    1. USSnackerSWE
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    1. COYou have to use sessions to hold authentication state. Do NOT use cookies! I can't stress enough how bad the idea of using cookies for authentication state is. I can easily change or create a cookie with the user `admin` or _any_ user for that matter. Do you get it? I can be anything I like in your system.
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      1. POPHP - User gets logged in automatically
      1. USShef
    2. COHi, try adding path to cookie. ex. - `setcookie('user', $val, time()+(3600*24), '/' )`
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      1. POPHP - User gets logged in automatically
      1. USJanis Lankovskis
    3. COTry checking from Chromes main cookie tab whether the cookie still remains and not the extension. And also add the optional parameters just in case `setcookie('user_id', '', time()-3600,'/', '', 0, 0);`
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      1. POPHP - User gets logged in automatically
      1. USMob
 

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