I got 99 mime types but .btch ain't one

gistfile1.php

<?php 
$mimes = array(

	'hqx'   => 'application/mac-binhex40',
	'cpt'   => 'application/mac-compactpro',
	'csv'   => array('text/x-comma-separated-values', 'text/comma-separated-values', 'application/octet-stream'),
	'bin'   => 'application/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'   => 'application/x-photoshop',
	'so'    => 'application/octet-stream',
	'sea'   => 'application/octet-stream',
	'dll'   => 'application/octet-stream',
	'oda'   => 'application/oda',
	'pdf'   => array('application/pdf', 'application/x-download'),
	'ai'    => 'application/postscript',
	'eps'   => 'application/postscript',
	'ps'    => 'application/postscript',
	'smi'   => 'application/smil',
	'smil'  => 'application/smil',
	'mif'   => 'application/vnd.mif',
	'xls'   => array('application/excel', 'application/vnd.ms-excel', 'application/msexcel'),
	'ppt'   => array('application/powerpoint', 'application/vnd.ms-powerpoint'),
	'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',
	'php'   => array('application/x-httpd-php', 'text/x-php'),
	'php4'  => 'application/x-httpd-php',
	'php3'  => 'application/x-httpd-php',
	'phtml' => 'application/x-httpd-php',
	'phps'  => 'application/x-httpd-php-source',
	'js'    => 'application/x-javascript',
	'swf'   => 'application/x-shockwave-flash',
	'sit'   => 'application/x-stuffit',
	'tar'   => 'application/x-tar',
	'tgz'   => array('application/x-tar', 'application/x-gzip-compressed'),
	'xhtml' => 'application/xhtml+xml',
	'xht'   => 'application/xhtml+xml',
	'zip'   => array('application/x-zip', 'application/zip', 'application/x-zip-compressed'),
	'mid'   => 'audio/midi',
	'midi'  => 'audio/midi',
	'mpga'  => 'audio/mpeg',
	'mp2'   => 'audio/mpeg',
	'mp3'   => array('audio/mpeg', 'audio/mpg', 'audio/mpeg3', 'audio/mp3'),
	'aif'   => 'audio/x-aiff',
	'aiff'  => 'audio/x-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'   => 'audio/x-wav',
	'bmp'   => 'image/bmp',
	'gif'   => 'image/gif',
	'jpeg'  => array('image/jpeg', 'image/pjpeg'),
	'jpg'   => array('image/jpeg', 'image/pjpeg'),
	'jpe'   => array('image/jpeg', 'image/pjpeg'),
	'png'   => 'image/png',
	'tiff'  => 'image/tiff',
	'tif'   => 'image/tiff',
	'css'   => 'text/css',
	'html'  => 'text/html',
	'htm'   => 'text/html',
	'shtml' => 'text/html',
	'txt'   => 'text/plain',
	'text'  => 'text/plain',
	'log'   => array('text/plain', 'text/x-log'),
	'rtx'   => 'text/richtext',
	'rtf'   => 'text/rtf',
	'xml'   => 'text/xml',
	'xsl'   => 'text/xml',
	'mpeg'  => 'video/mpeg',
	'mpg'   => 'video/mpeg',
	'mpe'   => 'video/mpeg',
	'qt'    => 'video/quicktime',
	'mov'   => 'video/quicktime',
	'avi'   => 'video/x-msvideo',
	'movie' => 'video/x-sgi-movie',
	'doc'   => 'application/msword',
	'docx'  => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
	'xlsx'  => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
	'word'  => array('application/msword', 'application/octet-stream'),
	'xl'    => 'application/excel',
	'eml'   => 'message/rfc822',
	'json'  => array('application/json', 'text/json'),

);