Are BBcodes with PHP Callback cached?

[rhodes]

I use media pages in my Xenforo that use a PHP callback returning an HTML string.

In one thread sometimes several of these BBCodes are included. Is the returned HTML string automatically cached with the thread or is the PHPCallback executed again on each page load?

If the HTML string of the BBCode is not cached what options would I have. Simplecache could quickly reach its limits with a larger number of BBCodes.
Are BBcodes with PHP Callback cached?

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