cached include extension

does anybody know of an extension to PHP that can do 'include' calls in a cached manner? The problem is this - Im designing a site which will have a lot of dynamic assembly and delivery of chunks of php. Im concerned that a lot of this: <? include 'my_header.html' ?> <? include 'chunk_123.php' ?> <? include 'chunk_456.php' ?> <? include 'chunk_789.php' ?> <? include 'my_footer.html' ?> will cause a lot of file IO and slow down the site. Is there some mechanism already in place to load up a few megs of php code to an internal hashtable, and then pull out chunks on the final page to be evaluated? -- Brian 'Bex' Huff bex@stellent.com Phone: 952-903-2023 Fax: 952-829-5424