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POWhen I export files with php/html my session data resets
 

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  1. POWhen I export files with php/html my session data resets
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    <p>I have a web-based system built with user login data based on session variables.</p> <p>Sometimes when a user is logged in and tries to export tables to csv or xls the session data seems to wipe and the user is 'kicked out' of the system.</p> <p>This is the header code I'm using to serve the file.</p> <pre><code> header("Pragma: public"); header("Expires: 0"); header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); header("Content-Type: application/force-download"); header("Content-Type: application/octet-stream"); header("Content-Type: application/download"); header("Content-Disposition: attachment;filename=file.xls"); header("Content-Transfer-Encoding: binary "); </code></pre> <p>If it helps it seems to be more prevalent on ie6. I was wondering if anyone has had similar issues.</p> <p>This is the latest header I've tried. Still no luck. Also tested the exact same procedure in FF/Opera/Safari and they're fine.</p> <pre><code>header('Cache-Control: no-store, private, no-cache, must-revalidate'); // HTTP/1.1 header('Cache-Control: pre-check=0, post-check=0, max-age=0, max-stale = 0', false); // HTTP/1.1 header('Expires: Sat, 26 Jul 1997 05:00:00 GMT'); // Date in the past header('Expires: 0', false); header('Last-Modified: '.gmdate('D, d M Y H:i:s') . ' GMT'); header('Pragma: no-cache'); header("Content-Type: application/vnd.ms-excel"); header("Content-Disposition: attachment;filename=$fileName"); header("Content-Transfer-Encoding: binary "); </code></pre>
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    1. COthe expires header should be in this format (yes GMT): Expires: Thu, 01 Dec 1994 16:00:00 GMT
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