title: Display PNG with raw image data within an html document using PHP
body: <p>With this code, I am trying to create an image of a signature from JSON and then display the image directly in the browser without saving it.  The problem I have is I want to display this image within a HTML document so the header information has already been modified.  Is there a way to display an image from it's raw image data within an HTML document?  Or any other way around this issue?</p>
  
  <pre><code>$json = $ticket-&gt;sig; // get the json representing the signature
  $img = sigJsonToImage($json);  //get image resource from json
  
      // HERE I WANT TO DISPLAY THE IMAGE BUT GET Cannot modify header information
  header('Content-Type: image/png');
  imagepng($img, null, 0, PNG_NO_FILTER);
  imagedestroy($img);
  </code></pre>