call function defined in a file include after this file
<p>Suppose I have following files </p>

<pre><code>&lt;?php 
     include 'file_A';
     include 'file_B';
 ?&gt;
</code></pre>

<p>a function defined <code>foo()</code> in <code>file_B</code>, is there any way to use it in <code>file_A</code> by any means???</p>

<p>actually, I am working in a application where a range of different functions are defined in modules, I want to use these function across the modules without looking where it defined included before or after the file even.</p>
