php problem
public php v1 · immutableindex.php:<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" > <head> <title>testing</title> </head> <body> <?php require("header.php"); ?> <?php require("bottom.php"); ?> </body></html>header.php:<p>TESTING</p>bottom:<p>TESTING</p>------------------------------------------what is the problem ? :/