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    <p>There is no need to do what you are attempting. When you start a session in PHP with session_start() a unique SESSIONID is already generated for you. You should <em>not</em> be putting this on the form. It is handled via cookies by default. There is also no need to check the SESSIONID either, that again is handled for you. </p> <p>You are responsible for authenticating the user and storing their authenticated identity (e.g. $_SESSION['user_id'] = $userId in the SESSION. If a user logs out you destroy their session with session_destroy.</p> <p>You should ensure session_start() is one of the <em>first</em> things for all pages in your site.</p> <p>Here is a basic example:</p> <pre><code>&lt;?php session_start(); // starts new or resumes existing session session_regenerate_id(true); // regenerates SESSIONID to prevent hijacking function login($username, $password) { $user = new User(); if ($user-&gt;login($username, $password)) { $_SESSION['user_id'] = $user-&gt;getId(); return true; } return false; } function logout() { session_destroy(); } function isLoggedIn() { return isset($_SESSION['user_id']); } function generateFormHash($salt) { $hash = md5(mt_rand(1,1000000) . $salt); $_SESSION['csrf_hash'] = $hash return $hash; } function isValidFormHash($hash) { return $_SESSION['csrf_hash'] === $hash; } </code></pre> <p>Edit: I misunderstood the original question. I added the relevant methods above for generating and validating form hashes;</p> <p>Please see the following resources:</p> <ul> <li><a href="http://us3.php.net/manual/en/book.session.php" rel="noreferrer">PHP Session Handling</a></li> <li><a href="http://us3.php.net/manual/en/function.session-start.php" rel="noreferrer">session_start()</a></li> <li><a href="http://us3.php.net/manual/en/function.session-destroy.php" rel="noreferrer">session_destroy()</a></li> </ul>
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    1. COThere is something I don't understand. I also use php sessions for tokens, but each time I modify one session, all of them get modified (the "date modified" of all tmp files changes). Is there any connection between sessions that identify different users?
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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