PHP获得文件的mime type类型

/**
 * 获得文件的mime type类型
 * @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');
	}
}

PHP, mime, type