I had this code but I do not Knew how I can add logout after x minutes of inactive in php  login page:  &lt;html&gt; &lt;head&gt; &lt;title&gt;login&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;form action="page1.php" method="get" &gt; ID:&lt;input type="text" name="id"  /&gt; Password:&lt;input  type="password" name="pass" /&gt; &lt;input type="submit" value="login" /&gt; &lt;/form&gt; &lt;/body&gt; &lt;/html&gt;   get page:                                                    &lt;html&gt; &lt;head&gt; &lt;title&gt; get&lt;/title&gt; &lt;body&gt; &lt;?php session_start(); $get_id= $_GET['id']; $get_pass = $_GET['pass']; $_SESSION['user_id']=$get_id; $_SESSION['user_pass']=$get_pass; echo "welcome"; ?&gt; &lt;/body&gt; &lt;/html&gt;   now I want this code logout after inactive 10 minutes
I need to keep a session alive for 30 minutes and then destroy it.
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