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copied!<p>As others have pointed out, you are mixing <code>if() { ... }</code> and <code>if(): endif;</code>, which is confusing things. There's no actual difference between the two, but they have to match up in pairs - you can't write <code>if ( test_something() ) { do_something(); endif;</code> This is documented in the manual under <a href="http://php.net/manual/en/control-structures.alternative-syntax.php" rel="nofollow">Alternative syntax for control structures</a>:</p> <blockquote> <p>Note: Mixing syntaxes in the same control block is not supported. </p> </blockquote> <p>The other thing to note is that each PHP file included must have valid syntax on its own - PHP doesn't stick all the code together and then parse it - so you can't open an <code>if</code> statement in one file and then close it in another. (I can't actually find a good manual reference for this; if someone knows one, let me know in the comments, or edit it in here.)</p> <p>If you always indent further when you open an <code>if</code> statement or similar block, the structure of code generally becomes much clearer. If we do this to your code, and strip out everything else, we are left with this; see the comments I've added for where it's going wrong:</p> <pre><code>// header.php if ($page == 'profile'): if(isset($_GET['username']) && empty($_GET['username']) === false) { if ($users->user_exists($username) === false) { }else{ } // Closing with endif, but opened with { endif; // unclosed if statement at end of file // footer.php: if ($page == 'profile'): // closing with } but opened with : }else{ } // stray endif, presumably intended to match the if: at the top of header.php endif; </code></pre>

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