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POIE9 not clearing cache in between posts
 

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    <p>I have a page that does the following:</p> <ol> <li>Click button to submit form</li> <li>Page posts to itself, and an SQL query is executed to update a field in the DB.</li> <li>The code then checks if there were any affected rows from the query execution and it is echoed. I expect it to echo Affected rows "1"</li> </ol> <p>In Firefox, Safari, and Chrome, this operation works every time without fail. In IE9 though, it works the first time, maybe 2 times or even 3, and then it does something weird - <strong>It echoes Affected rows "0"</strong> - <strong>even though the query executed just fine (the DB was updated).</strong></p> <p>I believe this is a <strong>cache problem</strong> of some sort, because when i clear the browser cache in IE before step 1 (submitting the form) it works every time as desired.</p> <p>Ive tried using this code:</p> <pre><code>header('Cache-Control: no-cache, no-store, must-revalidate'); // HTTP 1.1. header('Pragma: no-cache'); // HTTP 1.0. header("Expires: Sat, 26 Jul 1997 05:00:00 GMT"); // Date in the past </code></pre> <p>And this in the <code>&lt;head&gt;</code> tag:</p> <pre><code>&lt;meta http-equiv="Cache-Control" content="no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0" /&gt; &lt;meta http-equiv="Pragma" content="no-cache" /&gt; &lt;meta http-equiv="Expires" content="Mon, 26 Jul 1997 05:00:00 GMT" /&gt; </code></pre> <p>What is going on? How can i stop IE from playing up like this?</p> <p><strong>Update:</strong></p> <p>There seems to be some sort of inconsistency with PHP PDO's rowCount() (used to get affected rows)... In my case, i can't imagine how, but the inconsistency is linked to browser cache. Instead of using rowCount() after executing my query, i perform a SELECT to determine whether the field was updated with the new val. This seems to be working consistently.</p>
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