Detailed explanation of the steps to obtain file mime types in PHP

<?php

/*

 * Copyright 2010-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.

 *

 * Licensed under the Apache License, Version 2.0 (the "License").

 * You may not use this file except in compliance with the License.

 * A copy of the License is located at

 *

 * http://aws.amazon.com/apache2.0

 *

 * or in the "license" file accompanying this file. This file is distributed

 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either

 * express or implied. See the License for the specific language governing

 * permissions and limitations under the License.

 */

/*%******************************************************************************************%*/

// CLASS

/**

 * Simplifies the process of looking up the content-types for a variety of file extensions.

 *

 * @version 2010.07.20

 * @license See the included NOTICE.md file for more information.

 * @copyright See the included NOTICE.md file for more information.

 * @link http://aws.amazon.com/php/ PHP Developer Center

 */

class CFMimeTypes

{

  /**

   * Map of the extension-to-mime-types that we support.

   */

  public static $mime_types = array(

    '3gp' => 'video/3gpp',

    'ai' => 'application/postscript',

    'aif' => 'audio/x-aiff',

    'aifc' => 'audio/x-aiff',

    'aiff' => 'audio/x-aiff',

    'asc' => 'text/plain',

    'atom' => 'application/atom+xml',

    'au' => 'audio/basic',

    'avi' => 'video/x-msvideo',

    'bcpio' => 'application/x-bcpio',

    'bin' => 'application/octet-stream',

    'bmp' => 'image/bmp',

    'cdf' => 'application/x-netcdf',

    'cgm' => 'image/cgm',

    'class' => 'application/octet-stream',

    'cpio' => 'application/x-cpio',

    'cpt' => 'application/mac-compactpro',

    'csh' => 'application/x-csh',

    'css' => 'text/css',

    'dcr' => 'application/x-director',

    'dif' => 'video/x-dv',

    'dir' => 'application/x-director',

    'djv' => 'image/vnd.djvu',

    'djvu' => 'image/vnd.djvu',

    'dll' => 'application/octet-stream',

    'dmg' => 'application/octet-stream',

    'dms' => 'application/octet-stream',

    'doc' => 'application/msword',

    'dtd' => 'application/xml-dtd',

    'dv' => 'video/x-dv',

    'dvi' => 'application/x-dvi',

    'dxr' => 'application/x-director',

    'eps' => 'application/postscript',

    'etx' => 'text/x-setext',

    'exe' => 'application/octet-stream',

    'ez' => 'application/andrew-inset',

    'flv' => 'video/x-flv',

    'gif' => 'image/gif',

    'gram' => 'application/srgs',

    'grxml' => 'application/srgs+xml',

    'gtar' => 'application/x-gtar',

    'gz' => 'application/x-gzip',

    'hdf' => 'application/x-hdf',

    'hqx' => 'application/mac-binhex40',

    'htm' => 'text/html',

    'html' => 'text/html',

    'ice' => 'x-conference/x-cooltalk',

    'ico' => 'image/x-icon',

    'ics' => 'text/calendar',

    'ief' => 'image/ief',

    'ifb' => 'text/calendar',

    'iges' => 'model/iges',

    'igs' => 'model/iges',

    'jnlp' => 'application/x-java-jnlp-file',

    'jp2' => 'image/jp2',

    'jpe' => 'image/jpeg',

    'jpeg' => 'image/jpeg',

    'jpg' => 'image/jpeg',

    'js' => 'application/x-javascript',

    'kar' => 'audio/midi',

    'latex' => 'application/x-latex',

    'lha' => 'application/octet-stream',

    'lzh' => 'application/octet-stream',

    'm3u' => 'audio/x-mpegurl',

    'm4a' => 'audio/mp4a-latm',

    'm4p' => 'audio/mp4a-latm',

    'm4u' => 'video/vnd.mpegurl',

    'm4v' => 'video/x-m4v',

    'mac' => 'image/x-macpaint',

    'man' => 'application/x-troff-man',

    'mathml' => 'application/mathml+xml',

    'me' => 'application/x-troff-me',

    'mesh' => 'model/mesh',

    'mid' => 'audio/midi',

    'midi' => 'audio/midi',

    'mif' => 'application/vnd.mif',

    'mov' => 'video/quicktime',

    'movie' => 'video/x-sgi-movie',

    'mp2' => 'audio/mpeg',

    'mp3' => 'audio/mpeg',

    'mp4' => 'video/mp4',

    'mpe' => 'video/mpeg',

    'mpeg' => 'video/mpeg',

    'mpg' => 'video/mpeg',

    'mpga' => 'audio/mpeg',

    'ms' => 'application/x-troff-ms',

    'msh' => 'model/mesh',

    'mxu' => 'video/vnd.mpegurl',

    'nc' => 'application/x-netcdf',

    'oda' => 'application/oda',

    'ogg' => 'application/ogg',

    'ogv' => 'video/ogv',

    'pbm' => 'image/x-portable-bitmap',

    'pct' => 'image/pict',

    'pdb' => 'chemical/x-pdb',

    'pdf' => 'application/pdf',

    'pgm' => 'image/x-portable-graymap',

    'pgn' => 'application/x-chess-pgn',

    'pic' => 'image/pict',

    'pict' => 'image/pict',

    'png' => 'image/png',

    'pnm' => 'image/x-portable-anymap',

    'pnt' => 'image/x-macpaint',

    'pntg' => 'image/x-macpaint',

    'ppm' => 'image/x-portable-pixmap',

    'ppt' => 'application/vnd.ms-powerpoint',

    'ps' => 'application/postscript',

    'qt' => 'video/quicktime',

    'qti' => 'image/x-quicktime',

    'qtif' => 'image/x-quicktime',

    'ra' => 'audio/x-pn-realaudio',

    'ram' => 'audio/x-pn-realaudio',

    'ras' => 'image/x-cmu-raster',

    'rdf' => 'application/rdf+xml',

    'rgb' => 'image/x-rgb',

    'rm' => 'application/vnd.rn-realmedia',

    'roff' => 'application/x-troff',

    'rtf' => 'text/rtf',

    'rtx' => 'text/richtext',

    'sgm' => 'text/sgml',

    'sgml' => 'text/sgml',

    'sh' => 'application/x-sh',

    'shar' => 'application/x-shar',

    'silo' => 'model/mesh',

    'sit' => 'application/x-stuffit',

    'skd' => 'application/x-koan',

    'skm' => 'application/x-koan',

    'skp' => 'application/x-koan',

    'skt' => 'application/x-koan',

    'smi' => 'application/smil',

    'smil' => 'application/smil',

    'snd' => 'audio/basic',

    'so' => 'application/octet-stream',

    'spl' => 'application/x-futuresplash',

    'src' => 'application/x-wais-source',

    'sv4cpio' => 'application/x-sv4cpio',

    'sv4crc' => 'application/x-sv4crc',

    'svg' => 'image/svg+xml',

    'swf' => 'application/x-shockwave-flash',

    't' => 'application/x-troff',

    'tar' => 'application/x-tar',

    'tcl' => 'application/x-tcl',

    'tex' => 'application/x-tex',

    'texi' => 'application/x-texinfo',

    'texinfo' => 'application/x-texinfo',

    'tif' => 'image/tiff',

    'tiff' => 'image/tiff',

    'tr' => 'application/x-troff',

    'tsv' => 'text/tab-separated-values',

    'txt' => 'text/plain',

    'ustar' => 'application/x-ustar',

    'vcd' => 'application/x-cdlink',

    'vrml' => 'model/vrml',

    'vxml' => 'application/voicexml+xml',

    'wav' => 'audio/x-wav',

    'wbmp' => 'image/vnd.wap.wbmp',

    'wbxml' => 'application/vnd.wap.wbxml',

    'webm' => 'video/webm',

    'wml' => 'text/vnd.wap.wml',

    'wmlc' => 'application/vnd.wap.wmlc',

    'wmls' => 'text/vnd.wap.wmlscript',

    'wmlsc' => 'application/vnd.wap.wmlscriptc',

    'wmv' => 'video/x-ms-wmv',

    'wrl' => 'model/vrml',

    'xbm' => 'image/x-xbitmap',

    'xht' => 'application/xhtml+xml',

    'xhtml' => 'application/xhtml+xml',

    'xls' => 'application/vnd.ms-excel',

    'xml' => 'application/xml',

    'xpm' => 'image/x-xpixmap',

    'xsl' => 'application/xml',

    'xslt' => 'application/xslt+xml',

    'xul' => 'application/vnd.mozilla.xul+xml',

    'xwd' => 'image/x-xwindowdump',

    'xyz' => 'chemical/x-xyz',

    'zip' => 'application/zip',

  );

  /**

   * Attempt to match the file extension to a known mime-type.

   *

   * @param string $ext (Required) The file extension to attempt to map.

   * @return string The mime-type to use for the file extension.

   */

  public static function get_mimetype($ext)

  {

    $ext = strtolower($ext); // Make sure the passed in extension is lowercase

    return isset(self::$mime_types[$ext]) ? self::$mime_types[$ext] : 'application/octet-stream';

  }

}