PHP实现的获取文件mimes类型工具类示例

<?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';  }}