php');

class A extends FPDF
{
...
}</code></pre>
</div>
and B in b.php:
<div class="doc-source">
<pre><code>require('fpdf.php');

class B extends FPDF
{
...
}</code></pre>
</div>
then make B extend A:
<div class="doc-source">
<pre><code>require('a.php');

class B extends A
{
...
}</code></pre>
</div>
and make your own class extend B:
<div class="doc-source">
<pre><code>require('b.php');

class PDF extends B
{
...
}

$pdf = new PDF();</code></pre>
</div>
</li>

<li id='q14'>
<p><b>14.</b> <span class='quest