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Editorial Team
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Asked: 2026-06-05T03:26:10+00:00

I have an canvas app in an IFRAME , I have been trying to

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I have an canvas app in an IFRAME, I have been trying to figure out for some time why it doesn’t work in IE. Finally I found a program called IEWatch which is a bit like firebug for explorer. Using this I have deduced that the sessionID for my app does not match on the index and the backend script. At the top of the index.php I have session_start() as I do on my backend script that I pass data to using ajax. If I reload the page the sessionID then match’s (index.php changes to match the backend.php sessionID. This does not happen in chrome.

What could be causing this?

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1 Answer

  1. Editorial Team

    You need for IE to accept cross-browser cookies is a P3P policy header. 

    //required for IE in iframe FB environments if sessions are to work.
header('P3P:CP="IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT"');

    Put this on top of index.php file

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