Ask a question about the include

Ask a question about the include
For example, I have a common.php file that contains
if (extension_loaded (' zlib ')) {Ob_start (' Ob_gzhandler ');}

if (extension_loaded (' zlib ')) {Ob_end_flush ();}
?>

This is a code to open zlib, the first sentence is open, the last sentence is the end, I want to insert him into the index.php, because there are some code in the index.php, how to automatically insert the first sentence to the top of the page, the last sentence inserted into the end of the page, this with the include can be, the specific operation is what, thank you.

------Solution--------------------
Divide two files, put the initialized parts into the header, and the final output into footer.

In the first and last include, respectively.

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