');
$mail-&gt;AddStringAttachment($doc, 'doc.pdf', 'base64', 'application/pdf');
$mail-&gt;Send();</code></pre>
</div>
</li>

<li id='q16'>
<p><b>16.</b> <span class='question'>What's the limit of the file sizes I can generate with FPDF?</span></p>
There is no particular limit. There are some constraints, however:
<br>
<br>
- There is usually a maximum memory size allocated to PHP scripts. For very big documents,
especially with images, the limit may be reached (the file being built in memory). The
paramete