PHP獲得文件的mime type類型

<?php
/**


獲得文件的mime type類型
@author xiaobing.meng
/
class MimeTypes {
 public static $mime_types = array (

     'apk' => 'application/vnd.android.package-archive',
     '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' );


public static function get_mimetype($ext) {

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

}
}
</pre>