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  1. PO
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    <p>First of all, the following seems odd to me:</p> <pre><code>//sanitizes input and prevents sql injection attacks foreach($_POST as $key =&gt; $value) { $data[$key] = filter($value); $_SESSION[$key] = $value; } </code></pre> <p>Does this mean that you're saving everything in <code>$_POST</code> to your <code>$_SESSION</code>? That can't be what you want, since if you're using your session in another part of your site for login information, and for instance store the username in <code>$_SESSION['username']</code>, then someone can override this with submitting your form with a 'username' parameter. So you probably don't want to do that; I'd suggest just checking for the POST variables you actually want and sanitize them to where you want them.</p> <p>I'd suggest changing your code to something like:</p> <pre><code>$sports = array(); if (isset($_POST['sport']) &amp;&amp; is_array($_POST['sport'])) { foreach ($_POST['sport'] as $sport) { if (is_numeric($sport)) // example sanitation, since only numeric ids are allowed $sports[] = $sport; } $_SESSION['sports'] = $sports; } elseif (isset($_SESSION['sports'])) { $sports = $_SESSION['sports']; } </code></pre> <p>This will allow the user to override the sports in the session if they submit any sports. If you want to allow an empty sports array in the session, you'd want to change the check in the first if-statement to something like <code>if (isset($_POST['submit'])</code>, to check if the form was submitted (and your submit button is named 'submit').</p> <p>If the first condition fails (i.e., there's no new sports array passed), the sports array that was stored in the session will be used.</p> <p>Then, your second part of the code to check if a sport was checked, would be something like:</p> <pre><code>$checked = in_array($id, $sports); $content .= '&lt;td&gt;&lt;input type="checkbox" name="sport[]" value="'.$id.'" id="sport'.$id.'" '.($checked?'checked="checked':'').'&gt;'.$name.'&lt;/td&gt;'; </code></pre> <p>(Assuming that <code>$id</code> and <code>$name</code> are set properly.)</p> <p><strong>Update:</strong> Also check whether the sport array from <code>POST</code> is actually an array.</p>
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    1. POStoring and updating checkbox array with PHP sessions
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    1. USralphje
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    1. POStoring and updating checkbox array with PHP sessions
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    1. COThanks for your concern about the session, but that page will only be accessible by non authenticated users and the session is destroyed when mysql is actually submitted error free.
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      1. USAllen Hall
    2. COWhy don't you just use a local variable for this? I don't see the point of using your session for something like this. What if you are using an external library or plan to extend your software in the future? (And still, you can just name the properties you want, there's nothing wrong with that.)
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    3. CODepending on where you submit, why can't you just refer to `$_POST` then? Otherwise, I'd suggest using something like `$_SESSION['sports_post_data']`. That's a lot cleaner.
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