performance: php includes or ssi includes?

[john2k]

Using Linux & Apache, generally, what is more efficient/better/faster or offers more performance from the server - php includes or ssi includes?

Now a second question - which of the following offers better performance of the server:

• using SSI to include the text of 6 static text files and the output of 1 php script

or

• using php to include a single php file that contains the text of the 6 text files & output of the 1 php script (in the above example) as variables then using 'echo' & the variables to place the different sections of text where they belong on the page.

?

[kamy99]

just use php includes