title: How to disable Ligatures/Diacritics functionality in mpdf?
body: <p>I generate PDFs with MPDF 8.1.1. These PDF include email addresses. But it looks like the &quot;Combining Diacritics&quot; functionality or the &quot;Ligatures&quot; of the font rendering destroys some of them. I provide UTF8 encoded text.</p>
  <p>For example, if the address contains <code>ffl</code>, it replaces this by a glyph <code>ﬄ</code> and turns the email address invalid.</p>
  <p>I tried to instantiate mPDF with <em>allow_charset_conversion=false</em> like this</p>
  <pre><code>$pdf = new Mpdf\Mpdf([
    'PDFA' =&gt; true,
    'PDFAauto' =&gt; true,
    'allow_charset_conversion' =&gt; false
  ]);
  </code></pre>
  <p>But it continues to destroy emails.</p>
  <p>What is the correct way to disable that &quot;Combining Diacritics&quot; functionality or &quot;Ligatures&quot; replacement?</p>