文件 mime 类型，总结

/*
| -------------------------------------------------------------------
| MIME TYPES
| -------------------------------------------------------------------
| This file contains an array of mime types.  It is used by the
| Upload class to help identify allowed file types.
|
*/
$mimes = array(
    'hqx'    =>    array('application/mac-binhex40', 'application/mac-binhex', 'application/x-binhex40', 'application/x-mac-binhex40'),
    'cpt'    =>    'application/mac-compactpro',
    'csv'    =>    array('text/x-comma-separated-values', 'text/comma-separated-values', 'application/octet-stream', 'application/vnd.ms-excel', 'application/x-csv', 'text/x-csv', 'text/csv', 'application/csv', 'application/excel', 'application/vnd.msexcel', 'text/plain'),
    'bin'    =>    array('application/macbinary', 'application/mac-binary', 'application/octet-stream', 'application/x-binary', 'application/x-macbinary'),
    'dms'    =>    'application/octet-stream',
    'lha'    =>    'application/octet-stream',
    'lzh'    =>    'application/octet-stream',
    'exe'    =>    array('application/octet-stream', 'application/x-msdownload'),
    'class'    =>    'application/octet-stream',
    'psd'    =>    array('application/x-photoshop', 'image/vnd.adobe.photoshop'),
    'so'    =>    'application/octet-stream',
    'sea'    =>    'application/octet-stream',
    'dll'    =>    'application/octet-stream',
    'oda'    =>    'application/oda',
    'pdf'    =>    array('application/pdf', 'application/force-download', 'application/x-download', 'binary/octet-stream'),
    'ai'    =>    array('application/pdf', 'application/postscript'),
    'eps'    =>    'application/postscript',
    'ps'    =>    'application/postscript',
    'smi'    =>    'application/smil',
    'smil'    =>    'application/smil',
    'mif'    =>    'application/vnd.mif',
    'xls'    =>    array('application/vnd.ms-excel', 'application/msexcel', 'application/x-msexcel', 'application/x-ms-excel', 'application/x-excel', 'application/x-dos_ms_excel', 'application/xls', 'application/x-xls', 'application/excel', 'application/download', 'application/vnd.ms-office', 'application/msword'),
    'ppt'    =>    array('application/powerpoint', 'application/vnd.ms-powerpoint', 'application/vnd.ms-office', 'application/msword'),
    'pptx'    =>     array('application/vnd.openxmlformats-officedocument.presentationml.presentation', 'application/x-zip', 'application/zip'),
    'wbxml'    =>    'application/wbxml',
    'wmlc'    =>    'application/wmlc',
    'dcr'    =>    'application/x-director',
    'dir'    =>    'application/x-director',
    'dxr'    =>    'application/x-director',
    'dvi'    =>    'application/x-dvi',
    'gtar'    =>    'application/x-gtar',
    'gz'    =>    'application/x-gzip',
    'gzip'  =>    'application/x-gzip',
    'php'    =>    array('application/x-httpd-php', 'application/php', 'application/x-php', 'text/php', 'text/x-php', 'application/x-httpd-php-source'),
    'php4'    =>    'application/x-httpd-php',
    'php3'    =>    'application/x-httpd-php',
    'phtml'    =>    'application/x-httpd-php',
    'phps'    =>    'application/x-httpd-php-source',
    'js'    =>    array('application/x-javascript', 'text/plain'),
    'swf'    =>    'application/x-shockwave-flash',
    'sit'    =>    'application/x-stuffit',
    'tar'    =>    'application/x-tar',
    'tgz'    =>    array('application/x-tar', 'application/x-gzip-compressed'),
    'z'    =>    'application/x-compress',
    'xhtml'    =>    'application/xhtml+xml',
    'xht'    =>    'application/xhtml+xml',
    'zip'    =>    array('application/x-zip', 'application/zip', 'application/x-zip-compressed', 'application/s-compressed', 'multipart/x-zip'),
    'rar'    =>    array('application/x-rar', 'application/rar', 'application/x-rar-compressed'),
    'mid'    =>    'audio/midi',
    'midi'    =>    'audio/midi',
    'mpga'    =>    'audio/mpeg',
    'mp2'    =>    'audio/mpeg',
    'mp3'    =>    array('audio/mpeg', 'audio/mpg', 'audio/mpeg3', 'audio/mp3'),
    'aif'    =>    array('audio/x-aiff', 'audio/aiff'),
    'aiff'    =>    array('audio/x-aiff', 'audio/aiff'),
    'aifc'    =>    'audio/x-aiff',
    'ram'    =>    'audio/x-pn-realaudio',
    'rm'    =>    'audio/x-pn-realaudio',
    'rpm'    =>    'audio/x-pn-realaudio-plugin',
    'ra'    =>    'audio/x-realaudio',
    'rv'    =>    'video/vnd.rn-realvideo',
    'wav'    =>    array('audio/x-wav', 'audio/wave', 'audio/wav'),
    'bmp'    =>    array('image/bmp', 'image/x-bmp', 'image/x-bitmap', 'image/x-xbitmap', 'image/x-win-bitmap', 'image/x-windows-bmp', 'image/ms-bmp', 'image/x-ms-bmp', 'application/bmp', 'application/x-bmp', 'application/x-win-bitmap'),
    'gif'    =>    'image/gif',
    'jpeg'    =>    array('image/jpeg', 'image/pjpeg'),
    'jpg'    =>    array('image/jpeg', 'image/pjpeg'),
    'jpe'    =>    array('image/jpeg', 'image/pjpeg'),
    'png'    =>    array('image/png',  'image/x-png'),
    'tiff'    =>    'image/tiff',
    'tif'    =>    'image/tiff',
    'css'    =>    array('text/css', 'text/plain'),
    'html'    =>    array('text/html', 'text/plain'),
    'htm'    =>    array('text/html', 'text/plain'),
    'shtml'    =>    array('text/html', 'text/plain'),
    'txt'    =>    'text/plain',
    'text'    =>    'text/plain',
    'log'    =>    array('text/plain', 'text/x-log'),
    'rtx'    =>    'text/richtext',
    'rtf'    =>    'text/rtf',
    'xml'    =>    array('application/xml', 'text/xml', 'text/plain'),
    'xsl'    =>    array('application/xml', 'text/xsl', 'text/xml'),
    'mpeg'    =>    'video/mpeg',
    'mpg'    =>    'video/mpeg',
    'mpe'    =>    'video/mpeg',
    'qt'    =>    'video/quicktime',
    'mov'    =>    'video/quicktime',
    'avi'    =>    array('video/x-msvideo', 'video/msvideo', 'video/avi', 'application/x-troff-msvideo'),
    'movie'    =>    'video/x-sgi-movie',
    'doc'    =>    array('application/msword', 'application/vnd.ms-office'),
    'docx'    =>    array('application/vnd.openxmlformats-officedocument.wordprocessingml.document', 'application/zip', 'application/msword', 'application/x-zip'),
    'dot'    =>    array('application/msword', 'application/vnd.ms-office'),
    'dotx'    =>    array('application/vnd.openxmlformats-officedocument.wordprocessingml.document', 'application/zip', 'application/msword'),
    'xlsx'    =>    array('application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', 'application/zip', 'application/vnd.ms-excel', 'application/msword', 'application/x-zip'),
    'word'    =>    array('application/msword', 'application/octet-stream'),
    'xl'    =>    'application/excel',
    'eml'    =>    'message/rfc822',
    'json'  =>    array('application/json', 'text/json'),
    'pem'   =>    array('application/x-x509-user-cert', 'application/x-pem-file', 'application/octet-stream'),
    'p10'   =>    array('application/x-pkcs10', 'application/pkcs10'),
    'p12'   =>    'application/x-pkcs12',
    'p7a'   =>    'application/x-pkcs7-signature',
    'p7c'   =>    array('application/pkcs7-mime', 'application/x-pkcs7-mime'),
    'p7m'   =>    array('application/pkcs7-mime', 'application/x-pkcs7-mime'),
    'p7r'   =>    'application/x-pkcs7-certreqresp',
    'p7s'   =>    'application/pkcs7-signature',
    'crt'   =>    array('application/x-x509-ca-cert', 'application/x-x509-user-cert', 'application/pkix-cert'),
    'crl'   =>    array('application/pkix-crl', 'application/pkcs-crl'),
    'der'   =>    'application/x-x509-ca-cert',
    'kdb'   =>    'application/octet-stream',
    'pgp'   =>    'application/pgp',
    'gpg'   =>    'application/gpg-keys',
    'sst'   =>    'application/octet-stream',
    'csr'   =>    'application/octet-stream',
    'rsa'   =>    'application/x-pkcs7',
    'cer'   =>    array('application/pkix-cert', 'application/x-x509-ca-cert'),
    '3g2'   =>    'video/3gpp2',
    '3gp'   =>    array('video/3gp', 'video/3gpp'),
    'mp4'   =>    'video/mp4',
    'm4a'   =>    'audio/x-m4a',
    'f4v'   =>    'video/mp4',
    'webm'    =>    'video/webm',
    'aac'   =>    'audio/x-acc',
    'm4u'   =>    'application/vnd.mpegurl',
    'm3u'   =>    'text/plain',
    'xspf'  =>    'application/xspf+xml',
    'vlc'   =>    'application/videolan',
    'wmv'   =>    array('video/x-ms-wmv', 'video/x-ms-asf'),
    'au'    =>    'audio/x-au',
    'ac3'   =>    'audio/ac3',
    'flac'  =>    'audio/x-flac',
    'ogg'   =>    'audio/ogg',
    'kmz'    =>    array('application/vnd.google-earth.kmz', 'application/zip', 'application/x-zip'),
    'kml'    =>    array('application/vnd.google-earth.kml+xml', 'application/xml', 'text/xml'),
    'ics'    =>    'text/calendar',
    'ical'    =>    'text/calendar',
    'zsh'    =>    'text/x-scriptzsh',
    '7zip'    =>    array('application/x-compressed', 'application/x-zip-compressed', 'application/zip', 'multipart/x-zip'),
    'cdr'    =>    array('application/cdr', 'application/coreldraw', 'application/x-cdr', 'application/x-coreldraw', 'image/cdr', 'image/x-cdr', 'zz-application/zz-winassoc-cdr'),
    'wma'    =>    array('audio/x-ms-wma', 'video/x-ms-asf'),
    'jar'    =>    array('application/java-archive', 'application/x-java-application', 'application/x-jar', 'application/x-compressed'),
    'svg'    =>    array('image/svg+xml', 'application/xml', 'text/xml'),
    'vcf'    =>    'text/x-vcard',
    'srt'    =>    array('text/srt', 'text/plain'),
    'vtt'    =>    array('text/vtt', 'text/plain'),
    'ico'    =>    array('image/x-icon', 'image/x-ico', 'image/vnd.microsoft.icon')
);

总觉得有用，先记录下。