how to update a php file's source code via another php file
<p>let's say i have 2 files: a.php and b.php</p>

<p>a.php</p>

<pre><code>$value = "test";
</code></pre>

<p>i would like to update the $value by using b.php. i want to run b.php and change a.php like that:</p>

<pre><code>$value = "changed";
</code></pre>
