<?php

defined('BASEPATH') OR exit('No direct script access allowed');

/*

| -------------------------------------------------------------------

| MIME TYPES

| -------------------------------------------------------------------

| This file contains an array of mime types.  It is used by the

| Upload class to help identify allowed file types.

|

*/

return 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'),

'jp2' => array('image/jp2', 'video/mj2', 'image/jpx', 'image/jpm'),

'j2k' => array('image/jp2', 'video/mj2', 'image/jpx', 'image/jpm'),

'jpf' => array('image/jp2', 'video/mj2', 'image/jpx', 'image/jpm'),

'jpg2' => array('image/jp2', 'video/mj2', 'image/jpx', 'image/jpm'),

'jpx' => array('image/jp2', 'video/mj2', 'image/jpx', 'image/jpm'),

'jpm' => array('image/jp2', 'video/mj2', 'image/jpx', 'image/jpm'),

'mj2' => array('image/jp2', 'video/mj2', 'image/jpx', 'image/jpm'),

'mjp2' => array('image/jp2', 'video/mj2', 'image/jpx', 'image/jpm'),

'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' => array('text/plain', 'application/octet-stream'),

'text' => array('text/plain', 'application/octet-stream'),

'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'   => array('video/mp4', 'video/x-f4v'),

'flv' => 'video/x-flv',

'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'   => array('audio/ogg', 'video/ogg', 'application/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')

);

보통 이렇게 되어있는 mime.php가 config 안에 있고 파일 업로드시에 파일에 대한 타입을 mime_content_type 함수로 가져온다고 알고 있습니다.

그런데 txt파일을 보내니 자꾸 xml로 저장이 되는데

제가 질문드리고 싶은것은

1. 파일 업로드시에 해당 php 파일에서 

public function __construct(){

parent::__construct();

$this->load->helper('file');

}

이 부분에서 혹시 제가 선언해야 하는것이 따로 있는것인지와

2. 스택오버플로우에서 보니 mime_content_type의 경우 정확한 값을 반환하지 않는다 하던데 그것이 사실인지와 대응책은 어떻게 해야하는지,

3.PHP 5.0이상부터는 

$fi = new finfo(FILEINFO_MIME,'/usr/share/file/magic');

$mime_type = $fi->buffer(file_get_contents($_FILES['file']));

같은 방법을 사용하여 반환받던데 코드이그나이터도 이렇게 되어있는 부분이 있는지 여쭤보고 싶습니다.

많은 조언 부탁드립니다