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public php v1 · immutable<?php if ( stristr($_SERVER["HTTP_ACCEPT"],"application/xhtml+xml") ) { header("Content-type: application/xhtml+xml"); } else { header("Content-type: text/html"); }?><?php if ( stristr($_SERVER["HTTP_ACCEPT"],"application/xhtml+xml") ) { header("Content-type: application/xhtml+xml"); } else { header("Content-type: text/html"); }?>