PHP实现的获取文件mimes类型工具类示例

<?php
/
  Copyright 2010-2013 Amazon., 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 pliance with the License.
  A copy of the License is located at
 
  http://aws.amazon./apache2.0
 
  or in the "license" file acpanying 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./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-cdf',
    'cgm' => 'image/cgm',
    'class' => 'application/octet-stream',
    'cpio' => 'application/x-cpio',
    'cpt' => 'application/mac-pactpro',
    '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-cdf',
    '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';
  }
}