Font Awesome File Icons: Mapping MIME Types to correct icon classes

font-awesome-mime-type-icons.php

<?php

/**
 * Get font awesome file icon class for specific MIME Type
 * @see https://gist.github.com/guedressel/0daa170c0fde65ce5551
 *
 */
function font_awesome_file_icon_class( $mime_type ) {

  // List of official MIME Types: http://www.iana.org/assignments/media-types/media-types.xhtml
  static $font_awesome_file_icon_classes = array(
    // Images
    'image' => 'fa-file-image-o',
    // Audio
    'audio' => 'fa-file-audio-o',
    // Video
    'video' => 'fa-file-video-o',
    // Documents
    'application/pdf' => 'fa-file-pdf-o',
    'text/plain' => 'fa-file-text-o',
    'text/html' => 'fa-file-code-o',
    'application/json' => 'fa-file-code-o',
    // Archives
    'application/gzip' => 'fa-file-archive-o',
    'application/zip' => 'fa-file-archive-o',
    // Misc
    'application/octet-stream' => 'fa-file-o',
  );

  if (isset($font_awesome_file_icon_classes[ $mime_type ])) {
    return $font_awesome_file_icon_classes[ $mime_type ];
  }

  $mime_parts = explode('/', $mime_type, 2);
  $mime_group = $mime_parts[0];
  if (isset($font_awesome_file_icon_classes[ $mime_group ])) {
    return $font_awesome_file_icon_classes[ $mime_group ];
  }

  return "fa-file-o";
}

Excellent work, thank you. I used your code as inspiration to build a gist to map filenames (using the extension) to Font Awesome classes.
https://gist.github.com/DigitalLeaves/414365b686f7991af9d4fb9bdcc4cc4e