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copied!<p>I found a flaw in your implementation which results in deleting any session data:</p> <pre><code>return $this->stmt->fetchAll(); </code></pre> <p>in </p> <pre><code>public function Read($sessionsId) </code></pre> <p>That function <em>must</em> return a string, in your case the data from the <code>data</code> field.</p> <p>But you're returning an array (as it looks like - can't specifically say because the actual database is hidden, PDO/MySQLi?).</p> <p>However it's highly likely that unserializing the session data (see <code>session_decode()</code>) will fail, hence the session data will become empty and then saved again (as an empty string).</p> <p>This should be the cause of your problem. Fix it by returning the string data from the database.</p> <hr> <p>Next to that I suspect a kind of encoding issue but I'm not entirely sure that this causes it. But just consider the following:</p> <p>The session data is <em>binary</em> data, not <em>text</em>. You could change your table definition and access accordingly. In MySQL there is the <a href="http://dev.mysql.com/doc/refman/5.0/en/blob.html" rel="nofollow"><code>BLOB</code> Type</a> for that, and <a href="http://php.net/manual/en/pdostatement.bindparam.php" rel="nofollow"><code>bindParam()</code></a> could be helped with <code>PDO::PARAM_LOB</code> data type specifier.</p> <p>Probably this type of change will cure your issue. Otherwise it will make sure that you store the data un-altered which is what you want in any case. Stick to binary-safe handling for session data.</p>

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