PHP是否具有在给定内容类型的情况下返回文件扩展名的函数？
我正在寻找像以下一样的东西：
<?PHP function getFileExtension($contentType) { if ($contentType === 'image/png') { return '.png'; } elseif ($contentType === 'image/jpg') { return '.jpg'; } elseif ($contentType === 'application/zip') { return '.zip'; } else { return FALSE; } }
目标是使用处理所有内容类型的库函数.基于上面的模式,我想我可以用这样的东西来推销自己：
<?PHP function getFileExtension($contentType) { $pieces = explode('/',$contentType); return '.' . array_pop($pieces); }
鉴于我的应用程序数据库中存储的文件类型数量有限,以下类/方法是可接受的解决方案.
原文链接：https://www.f2er.com/php/138645.html<?PHP class AppUtil { public static function FileExt($contentType) { $map = array( 'application/pdf' => '.pdf','application/zip' => '.zip','image/gif' => '.gif','image/jpeg' => '.jpg','image/png' => '.png','text/css' => '.css','text/html' => '.html','text/javascript' => '.js','text/plain' => '.txt','text/xml' => '.xml',); if (isset($map[$contentType])) { return $map[$contentType]; } // HACKISH CATCH ALL (WHICH IN MY CASE IS // PREFERRED OVER THROWING AN EXCEPTION) $pieces = explode('/',$contentType); return '.' . array_pop($pieces); } } echo AppUtil::FileExt('application/zip'); // prints '.zip'
在解决上述解决方案之前,我在Google上进行了一些搜索(由@whichdan建议)并找到了以下“MIME类型扩展”映射资源.
http://www.webmaster-toolkit.com/mime-types.shtml
在对上述URL中显示的数据进行一些分析之后,很明显没有针对此问题的明确解决方案(这可能是PHP中没有“内容类型到文件扩展名”功能的原因).
为了说明Stack Overflow社区的这一事实,我解析了上述URL中提供的数据,并将每种内容类型分为两类 – “DEFINITIVE”或“AMBIGUOUS”.在我的每个“post parse”数组上运行var_export会产生以下PHP代码.
<?PHP // DEFINITIVE "CONTENT TYPE TO FILE EXTENSION" MAPPINGS $definitive = array ( 'application/x-authorware-bin' => '.aab','application/x-authorware-map' => '.aam','application/x-authorware-seg' => '.aas','text/vnd.abc' => '.abc','video/animaflex' => '.afl','application/x-aim' => '.aim','text/x-audiosoft-intra' => '.aip','application/x-navi-animation' => '.ani','application/x-nokia-9000-communicator-add-on-software' => '.aos','application/mime' => '.aps','application/arj' => '.arj','image/x-jg' => '.art','text/asp' => '.asp','application/x-mplayer2' => '.asx','video/x-ms-asf-plugin' => '.asx','audio/x-au' => '.au','application/x-troff-msvideo' => '.avi','video/avi' => '.avi','video/msvideo' => '.avi','video/x-msvideo' => '.avi','video/avs-video' => '.avs','application/x-bcpio' => '.bcpio','application/mac-binary' => '.bin','application/macbinary' => '.bin','application/x-binary' => '.bin','application/x-macbinary' => '.bin','image/x-windows-bmp' => '.bmp','application/x-bzip' => '.bz','application/vnd.ms-pki.seccat' => '.cat','application/clariscad' => '.ccad','application/x-cocoa' => '.cco','application/cdf' => '.cdf','application/x-cdf' => '.cdf','application/java' => '.class','application/java-byte-code' => '.class','application/x-java-class' => '.class','application/x-cpio' => '.cpio','application/mac-compactpro' => '.cpt','application/x-compactpro' => '.cpt','application/x-cpt' => '.cpt','application/pkcs-crl' => '.crl','application/pkix-crl' => '.crl','application/x-x509-user-cert' => '.crt','application/x-csh' => '.csh','text/x-script.csh' => '.csh','application/x-pointplus' => '.css','text/css' => '.css','application/x-deepv' => '.deepv','video/dl' => '.dl','video/x-dl' => '.dl','application/commonground' => '.dp','application/drafting' => '.drw','application/x-dvi' => '.dvi','drawing/x-dwf (old)' => '.dwf','model/vnd.dwf' => '.dwf','application/acad' => '.dwg','application/dxf' => '.dxf','text/x-script.elisp' => '.el','application/x-bytecode.elisp (compiled elisp)' => '.elc','application/x-elc' => '.elc','application/x-esrehber' => '.es','text/x-setext' => '.etx','application/envoy' => '.evy','application/vnd.fdf' => '.fdf','application/fractals' => '.fif','image/fif' => '.fif','video/fli' => '.fli','video/x-fli' => '.fli','text/vnd.fmi.flexstor' => '.flx','video/x-atomic3d-feature' => '.fmf','image/vnd.fpx' => '.fpx','image/vnd.net-fpx' => '.fpx','application/freeloader' => '.frl','image/g3fax' => '.g3','image/gif' => '.gif','video/gl' => '.gl','video/x-gl' => '.gl','application/x-gsp' => '.gsp','application/x-gss' => '.gss','application/x-gtar' => '.gtar','multipart/x-gzip' => '.gzip','application/x-hdf' => '.hdf','text/x-script' => '.hlb','application/hlp' => '.hlp','application/x-winhelp' => '.hlp','application/binhex' => '.hqx','application/binhex4' => '.hqx','application/mac-binhex' => '.hqx','application/mac-binhex40' => '.hqx','application/x-binhex40' => '.hqx','application/x-mac-binhex40' => '.hqx','application/hta' => '.hta','text/x-component' => '.htc','text/webviewhtml' => '.htt','x-conference/x-cooltalk' => '.ice ','image/x-icon' => '.ico','application/x-ima' => '.ima','application/x-httpd-imap' => '.imap','application/inf' => '.inf ','application/x-internett-signup' => '.ins','application/x-ip2' => '.ip ','video/x-isvideo' => '.isu','audio/it' => '.it','application/x-inventor' => '.iv','i-world/i-vrml' => '.ivr','application/x-livescreen' => '.ivy','audio/x-jam' => '.jam ','application/x-java-commerce' => '.jcm ','image/x-jps' => '.jps','application/x-javascript' => '.js ','image/jutvision' => '.jut','music/x-karaoke' => '.kar','application/x-ksh' => '.ksh','text/x-script.ksh' => '.ksh','audio/x-liveaudio' => '.lam','application/lha' => '.lha','application/x-lha' => '.lha','application/x-lisp' => '.lsp ','text/x-script.lisp' => '.lsp ','text/x-la-asf' => '.lsx','application/x-lzh' => '.lzh','application/lzx' => '.lzx','application/x-lzx' => '.lzx','text/x-m' => '.m','audio/x-mpequrl' => '.m3u ','application/x-troff-man' => '.man','application/x-navimap' => '.map','application/mbedlet' => '.mbd','application/x-magic-cap-package-1.0' => '.mc$','application/mcad' => '.mcd','application/x-mathcad' => '.mcd','image/vasa' => '.mcf','text/mcf' => '.mcf','application/netmc' => '.mcp','application/x-troff-me' => '.me ','application/x-frame' => '.mif','application/x-mif' => '.mif','www/mime' => '.mime ','audio/x-vnd.audioexplosion.mjuicemediafile' => '.mjf','video/x-motion-jpeg' => '.mjpg ','application/x-meme' => '.mm','audio/mod' => '.mod','audio/x-mod' => '.mod','audio/x-mpeg' => '.mp2','video/x-mpeq2a' => '.mp2','audio/mpeg3' => '.mp3','audio/x-mpeg-3' => '.mp3','application/vnd.ms-project' => '.mpp','application/marc' => '.mrc','application/x-troff-ms' => '.ms','application/x-vnd.audioexplosion.mzz' => '.mzz','application/vnd.nokia.configuration-message' => '.ncm','application/x-mix-transfer' => '.nix','application/x-conference' => '.nsc','application/x-navidoc' => '.nvd','application/oda' => '.oda','application/x-omc' => '.omc','application/x-omcdatamaker' => '.omcd','application/x-omcregerator' => '.omcr','text/x-pascal' => '.p','application/pkcs10' => '.p10','application/x-pkcs10' => '.p10','application/pkcs-12' => '.p12','application/x-pkcs12' => '.p12','application/x-pkcs7-signature' => '.p7a','application/x-pkcs7-certreqresp' => '.p7r','application/pkcs7-signature' => '.p7s','text/pascal' => '.pas','image/x-portable-bitmap' => '.pbm ','application/vnd.hp-pcl' => '.pcl','application/x-pcl' => '.pcl','image/x-pict' => '.pct','image/x-pcx' => '.pcx','application/pdf' => '.pdf','audio/make.my.funk' => '.pfunk','image/x-portable-graymap' => '.pgm','image/x-portable-greymap' => '.pgm','application/x-newton-compatible-pkg' => '.pkg','application/vnd.ms-pki.pko' => '.pko','text/x-script.perl' => '.pl','application/x-pixclscript' => '.plx','text/x-script.perl-module' => '.pm','application/x-portable-anymap' => '.pnm','image/x-portable-anymap' => '.pnm','model/x-pov' => '.pov','image/x-portable-pixmap' => '.ppm','application/powerpoint' => '.ppt','application/x-mspowerpoint' => '.ppt','application/x-freelance' => '.pre','paleovu/x-pv' => '.pvu','text/x-script.phyton' => '.py ','applicaiton/x-bytecode.python' => '.pyc ','audio/vnd.qcelp' => '.qcp ','video/x-qtc' => '.qtc','audio/x-realaudio' => '.ra','application/x-cmu-raster' => '.ras','image/x-cmu-raster' => '.ras','text/x-script.rexx' => '.rexx ','image/vnd.rn-realflash' => '.rf','image/x-rgb' => '.rgb ','application/vnd.rn-realmedia' => '.rm','audio/mid' => '.rmi','application/ringing-tones' => '.rng','application/vnd.nokia.ringing-tone' => '.rng','application/vnd.rn-realplayer' => '.rnx ','image/vnd.rn-realpix' => '.rp ','text/vnd.rn-realtext' => '.rt','application/x-rtf' => '.rtf','video/vnd.rn-realvideo' => '.rv','audio/s3m' => '.s3m ','application/x-lotusscreencam' => '.scm','text/x-script.guile' => '.scm','text/x-script.scheme' => '.scm','video/x-scm' => '.scm','application/sdp' => '.sdp ','application/x-sdp' => '.sdp ','application/sounder' => '.sdr','application/sea' => '.sea','application/x-sea' => '.sea','application/set' => '.set','application/x-sh' => '.sh','text/x-script.sh' => '.sh','audio/x-psid' => '.sid','application/x-sit' => '.sit','application/x-stuffit' => '.sit','application/x-seelogo' => '.sl ','audio/x-adpcm' => '.snd','application/solids' => '.sol','application/x-pkcs7-certificates' => '.spc ','application/futuresplash' => '.spl','application/streamingmedia' => '.ssm ','application/vnd.ms-pki.certstore' => '.sst','application/sla' => '.stl','application/vnd.ms-pki.stl' => '.stl','application/x-navistyle' => '.stl','application/x-sv4cpio' => '.sv4cpio','application/x-sv4crc' => '.sv4crc','x-world/x-svr' => '.svr','application/x-shockwave-flash' => '.swf','application/x-tar' => '.tar','application/toolbook' => '.tbk','application/x-tcl' => '.tcl','text/x-script.tcl' => '.tcl','text/x-script.tcsh' => '.tcsh','application/x-tex' => '.tex','application/plain' => '.text','application/gnutar' => '.tgz','audio/tsp-audio' => '.tsi','application/dsptype' => '.tsp','audio/tsplayer' => '.tsp','text/tab-separated-values' => '.tsv','text/x-uil' => '.uil','application/i-deas' => '.unv','application/x-ustar' => '.ustar','multipart/x-ustar' => '.ustar','application/x-cdlink' => '.vcd','text/x-vcalendar' => '.vcs','application/vda' => '.vda','video/vdo' => '.vdo','application/groupwise' => '.vew ','application/vocaltec-media-desc' => '.vmd ','application/vocaltec-media-file' => '.vmf','audio/voc' => '.voc','audio/x-voc' => '.voc','video/vosaic' => '.vos','audio/voxware' => '.vox','audio/x-twinvq' => '.vqf','application/x-vrml' => '.vrml','x-world/x-vrt' => '.vrt','application/wordperfect6.1' => '.w61','audio/wav' => '.wav','audio/x-wav' => '.wav','application/x-qpro' => '.wb1','image/vnd.wap.wbmp' => '.wbmp','application/vnd.xara' => '.web','application/x-123' => '.wk1','windows/Metafile' => '.wmf','text/vnd.wap.wml' => '.wml','application/vnd.wap.wmlc' => '.wmlc ','text/vnd.wap.wmlscript' => '.wmls','application/vnd.wap.wmlscriptc' => '.wmlsc ','application/x-wpwin' => '.wpd','application/x-lotus' => '.wq1','application/mswrite' => '.wri','application/x-wri' => '.wri','text/scriplet' => '.wsc','application/x-wintalk' => '.wtk ','image/x-xbitmap' => '.xbm','image/x-xbm' => '.xbm','image/xbm' => '.xbm','video/x-amt-demorun' => '.xdr','xgl/drawing' => '.xgz','image/vnd.xiff' => '.xif','audio/xm' => '.xm','application/xml' => '.xml','text/xml' => '.xml','xgl/movie' => '.xmz','application/x-vnd.ls-xpix' => '.xpix','image/xpm' => '.xpm','video/x-amt-showrun' => '.xsr','image/x-xwd' => '.xwd','image/x-xwindowdump' => '.xwd','application/x-compress' => '.z','application/x-zip-compressed' => '.zip','application/zip' => '.zip','multipart/x-zip' => '.zip','text/x-script.zsh' => '.zsh',);
…和…
<?PHP // AMBIGUOUS "CONTENT TYPE TO FILE EXTENSION" MAPPINGS $ambiguous = array ( 'x-world/x-3dmf' => array ( 0 => '.3dm',1 => '.3dmf',2 => '.qd3 ',3 => '.qd3d ',),'application/octet-stream' => array ( 0 => '.a',1 => '.arc',2 => '.arj',3 => '.bin',4 => '.com',5 => '.dump',6 => '.exe',7 => '.lha',8 => '.lhx',9 => '.lzh',10 => '.lzx',11 => '.o',12 => '.psd',13 => '.saveme',14 => '.uu',15 => '.zoo','text/html' => array ( 0 => '.acgi',1 => '.htm',2 => '.html',3 => '.htmls',4 => '.htx ',5 => '.shtml ','application/postscript' => array ( 0 => '.ai',1 => '.eps',2 => '.ps','audio/aiff' => array ( 0 => '.aif',1 => '.aifc',2 => '.aiff','audio/x-aiff' => array ( 0 => '.aif','video/x-ms-asf' => array ( 0 => '.asf',1 => '.asx','text/x-asm' => array ( 0 => '.asm',1 => '.s','audio/basic' => array ( 0 => '.au',1 => '.snd','image/bmp' => array ( 0 => '.bm',1 => '.bmp','application/book' => array ( 0 => '.boo',1 => '.book','application/x-bzip2' => array ( 0 => '.boz',1 => '.bz2','application/x-bsh' => array ( 0 => '.bsh',1 => '.sh',2 => '.shar','text/plain' => array ( 0 => '.c',1 => '.c++',2 => '.cc',3 => '.com',4 => '.conf',5 => '.cxx',6 => '.def',7 => '.f',8 => '.f90',9 => '.for',10 => '.g',11 => '.h',12 => '.hh',13 => '.idc',14 => '.jav',15 => '.java',16 => '.list',17 => '.log ',18 => '.lst ',19 => '.m',20 => '.mar',21 => '.pl',22 => '.sdml',23 => '.text',24 => '.txt','text/x-c' => array ( 0 => '.c',1 => '.cc',2 => '.cpp','application/x-netcdf' => array ( 0 => '.cdf',1 => '.nc','application/pkix-cert' => array ( 0 => '.cer',1 => '.crt','application/x-x509-ca-cert' => array ( 0 => '.cer',2 => '.der','application/x-chat' => array ( 0 => '.cha',1 => '.chat','application/x-director' => array ( 0 => '.dcr',1 => '.dir',2 => '.dxr','video/x-dv' => array ( 0 => '.dif',1 => '.dv','application/msword' => array ( 0 => '.doc',1 => '.dot',2 => '.w6w',3 => '.wiz',4 => '.word ','image/vnd.dwg' => array ( 0 => '.dwg',1 => '.dxf',2 => '.svf','image/x-dwg' => array ( 0 => '.dwg','application/x-envoy' => array ( 0 => '.env',1 => '.evy','text/x-fortran' => array ( 0 => '.f',1 => '.f77',2 => '.f90',3 => '.for','image/florian' => array ( 0 => '.flo',1 => '.turbot','audio/make' => array ( 0 => '.funk',1 => '.my',2 => '.pfunk','audio/x-gsm' => array ( 0 => '.gsd',1 => '.gsm','application/x-compressed' => array ( 0 => '.gz',1 => '.tgz',2 => '.z',3 => '.zip','application/x-gzip' => array ( 0 => '.gz',1 => '.gzip','text/x-h' => array ( 0 => '.h',1 => '.hh','application/x-helpfile' => array ( 0 => '.help',1 => '.hlp','application/vnd.hp-hpgl' => array ( 0 => '.hgl',1 => '.hpg',2 => '.hpgl','image/ief' => array ( 0 => '.ief',1 => '.iefs','application/iges' => array ( 0 => '.iges',1 => '.igs','model/iges' => array ( 0 => '.iges ','text/x-java-source' => array ( 0 => '.jav',1 => '.java ','image/jpeg' => array ( 0 => '.jfif',1 => '.jfif-tbnl',2 => '.jpe',3 => '.jpeg',4 => '.jpg ','image/pjpeg' => array ( 0 => '.jfif',1 => '.jpe',2 => '.jpeg',3 => '.jpg ','audio/midi' => array ( 0 => '.kar',1 => '.mid',2 => '.midi','audio/nspaudio' => array ( 0 => '.la ',1 => '.lma','audio/x-nspaudio' => array ( 0 => '.la ','application/x-latex' => array ( 0 => '.latex ',1 => '.ltx','video/mpeg' => array ( 0 => '.m1v',1 => '.m2v',2 => '.mp2',3 => '.mp3',4 => '.mpa',5 => '.mpe',6 => '.mpeg',7 => '.mpg','audio/mpeg' => array ( 0 => '.m2a',1 => '.mp2',2 => '.mpa',3 => '.mpg',4 => '.mpga','message/rfc822' => array ( 0 => '.mht',1 => '.mhtml',2 => '.mime ','application/x-midi' => array ( 0 => '.mid',1 => '.midi','audio/x-mid' => array ( 0 => '.mid','audio/x-midi' => array ( 0 => '.mid','music/crescendo' => array ( 0 => '.mid','x-music/x-midi' => array ( 0 => '.mid','application/base64' => array ( 0 => '.mm',1 => '.mme','video/quicktime' => array ( 0 => '.moov',1 => '.mov',2 => '.qt','video/x-sgi-movie' => array ( 0 => '.movie',1 => '.mv','video/x-mpeg' => array ( 0 => '.mp2',1 => '.mp3','application/x-project' => array ( 0 => '.mpc',1 => '.mpt',2 => '.mpv',3 => '.mpx','image/naplps' => array ( 0 => '.nap',1 => '.naplps','image/x-niff' => array ( 0 => '.nif',1 => '.niff','application/pkcs7-mime' => array ( 0 => '.p7c',1 => '.p7m','application/x-pkcs7-mime' => array ( 0 => '.p7c','application/pro_eng' => array ( 0 => '.part ',1 => '.prt','chemical/x-pdb' => array ( 0 => '.pdb',1 => '.xyz','image/pict' => array ( 0 => '.pic',1 => '.pict','image/x-xpixmap' => array ( 0 => '.pm',1 => '.xpm','application/x-pagemaker' => array ( 0 => '.pm4 ',1 => '.pm5','image/png' => array ( 0 => '.png',1 => '.x-png','application/mspowerpoint' => array ( 0 => '.pot',1 => '.pps',2 => '.ppt',3 => '.ppz','application/vnd.ms-powerpoint' => array ( 0 => '.pot',1 => '.ppa',2 => '.pps',3 => '.ppt',4 => '.pwz ','image/x-quicktime' => array ( 0 => '.qif',1 => '.qti',2 => '.qtif','audio/x-pn-realaudio' => array ( 0 => '.ra',1 => '.ram',2 => '.rm',3 => '.rmm ',4 => '.rmp','audio/x-pn-realaudio-plugin' => array ( 0 => '.ra',1 => '.rmp',2 => '.rpm','image/cmu-raster' => array ( 0 => '.ras',1 => '.rast','application/x-troff' => array ( 0 => '.roff',1 => '.t',2 => '.tr','text/richtext' => array ( 0 => '.rt',1 => '.rtf',2 => '.rtx','application/rtf' => array ( 0 => '.rtf',1 => '.rtx','application/x-tbook' => array ( 0 => '.sbk ',1 => '.tbk','text/sgml' => array ( 0 => '.sgm ',1 => '.sgml','text/x-sgml' => array ( 0 => '.sgm ','application/x-shar' => array ( 0 => '.sh',1 => '.shar','text/x-server-parsed-html' => array ( 0 => '.shtml',1 => '.ssi','application/x-koan' => array ( 0 => '.skd',1 => '.skm ',2 => '.skp ',3 => '.skt ','application/smil' => array ( 0 => '.smi ',1 => '.smil ','text/x-speech' => array ( 0 => '.spc ',1 => '.talk','application/x-sprite' => array ( 0 => '.spr',1 => '.sprite ','application/x-wais-source' => array ( 0 => '.src',1 => '.wsrc','application/step' => array ( 0 => '.step',1 => '.stp','application/x-world' => array ( 0 => '.svr',1 => '.wrl','application/x-texinfo' => array ( 0 => '.texi',1 => '.texinfo','image/tiff' => array ( 0 => '.tif',1 => '.tiff','image/x-tiff' => array ( 0 => '.tif','text/uri-list' => array ( 0 => '.uni',1 => '.unis',2 => '.uri',3 => '.uris','text/x-uuencode' => array ( 0 => '.uu',1 => '.uue','video/vivo' => array ( 0 => '.viv',1 => '.vivo','video/vnd.vivo' => array ( 0 => '.viv','audio/x-twinvq-plugin' => array ( 0 => '.vqe',1 => '.vql','model/vrml' => array ( 0 => '.vrml',2 => '.wrz','x-world/x-vrml' => array ( 0 => '.vrml','application/x-visio' => array ( 0 => '.vsd',1 => '.vst',2 => '.vsw ','application/wordperfect6.0' => array ( 0 => '.w60',1 => '.wp5','application/wordperfect' => array ( 0 => '.wp',2 => '.wp6 ',3 => '.wpd','application/excel' => array ( 0 => '.xl',1 => '.xla',2 => '.xlb',3 => '.xlc',4 => '.xld ',5 => '.xlk',6 => '.xll',7 => '.xlm',8 => '.xls',9 => '.xlt',10 => '.xlv',11 => '.xlw','application/x-excel' => array ( 0 => '.xla',1 => '.xlb',2 => '.xlc',3 => '.xld ',4 => '.xlk',5 => '.xll',6 => '.xlm',7 => '.xls',8 => '.xlt',9 => '.xlv',10 => '.xlw','application/x-msexcel' => array ( 0 => '.xla',1 => '.xls',2 => '.xlw','application/vnd.ms-excel' => array ( 0 => '.xlb',1 => '.xlc',2 => '.xll',3 => '.xlm',4 => '.xls',5 => '.xlw',);
