title: not a PNG file in FPDF
body: <p>In FPDF, I am using this function to print image on pdf file.</p>
  
  <pre><code>$this-&gt;Image("./media/logo_291.png",1,1,$image_size);
  </code></pre>
  
  <p>It's working fine in <code>.jpg</code> file. But not in <code>.png</code>. I checked on my server. The file is already there.
  When I change entire image with .jpg extension, then it works but not for .png format file.</p>
  
  <p><strong>ERROR</strong></p>
  
  <pre><code>FPDF error: Not a PNG file: ./media/logo_291.png
  </code></pre>
  
  <p><strong>EDIT</strong></p>
  
  <p>I can see the <code>.png</code> file in my browser. It's just problem with <code>FPDF</code>.</p>