Description:
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There is no footer function to go with the header function. The http 1.1 rfc introduced reply footers, there should be a way to set those.

Reproduce code:
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<?php
$contents=ob_get_flush();
echo $contents
footer('MD5:'.md5($contents));


Expected result:
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The footer should be sent.

Actual result:
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The function does not exist.