How to increment a session value in php
<p>I'm working on a login system. I have my login form which posts to check.php.</p>

<p>I'm trying to write a function to test the number of failed login attempts if the user details are incorrect.</p>

<pre><code>&lt;?php
//from check.php
if (blah)
{
    $_SESSION['error'] = "&lt;strong&gt;Details not correct.&lt;/strong&gt; Please try again.";     
    //$_SESSION['email'] = $email;
    $_SESSION['attempts'] = 1; //first attempt
    if(isset($_SESSION['attempts']))
    {
        $_SESSION['fail'] = $_SESSION['attempts']++; //increment
    }
    //$_SESSION['fail'] is echo'd on my login form 
}
</code></pre>