今天要說的是如何從WordPress默認(rèn)允許上傳的文件類型中，禁止上傳某些特定類型的文件，如WordPress默認(rèn)允許上傳 .exe 后綴名的可運(yùn)行文件，那么我們怎么禁止用戶在WordPress后臺發(fā)表文章時上傳 .exe 后綴名的文件呢？這就是本文要解答的問題。

     首先，我們要知道WordPress支持上傳哪些類型的文件，我們可以在當(dāng)前主題的functions.php中插入以下php代碼，然后打開博客首頁，查看網(wǎng)頁源代碼，即可看到一個完整的支持列表（看完后，記得刪除）：

1print_r(wp_get_mime_types());

下面是以上代碼輸出的結(jié)果，這里供大家參考，也免了大家去寫代碼看結(jié)果。下面是WordPress默認(rèn)允許上傳的文件類型列表：

01// []中括號中的名稱代表文件名后綴名/擴(kuò)展名02// => 后面的名稱代表的是后綴名所在應(yīng)的文件MIME信息03Array04(05    [jpg|jpeg|jpe] => image/jpeg06    [gif] => image/gif07    [png] => image/png08    [bmp] => image/bmp09    [tif|tiff] => image/tiff10    [ico] => image/x-icon11    [asf|asx|wax|wmv|wmx] => video/asf12    [avi] => video/avi13    [divx] => video/divx14    <p style="text-indent:0px;text-align:center;"><embed src="http://www.luoxiao123.cn/wp-content/themes/ConcisePro/images/shortcodes/swf/flvideo.swf?auto=0&flv=" menu="false"quality="high" wmode="transparent" bgcolor="#ffffff" name="flvideo"allowscriptaccess="sameDomain" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.adobe.com/go/getflashplayer_cn" align="middle"height="315" width="560"></p> => video/x-flv15    [mov|qt] => video/quicktime16    [mpeg|mpg|mpe] => video/mpeg17    [mp4|m4v] => video/mp418    [ogv] => video/ogg19    [mkv] => video/x-matroska20    [txt|asc|c|cc|h] => text/plain21    [csv] => text/csv22    [tsv] => text/tab-separated-values23    [ics] => text/calendar24    [rtx] => text/richtext25    [css] => text/css26    [htm|html] => text/html27    <p><embed src="http://www.luoxiao123.cn/wp-content/themes/ConcisePro/images/shortcodes/swf/dewplayer.swf?mp3=&autostart=0&autoreplay=0" wmode="transparent" type="application/x-shockwave-flash"height="20" width="240"></p> => audio/mpeg28    [ra|ram] => audio/x-realaudio29    [wav] => audio/wav30    [ogg|oga] => audio/ogg31    [mid|midi] => audio/midi32    [wma] => audio/wma33    [mka] => audio/x-matroska34    [rtf] => application/rtf35    [js] => application/javascript36    [pdf] => application/pdf37    [swf] => application/x-shockwave-flash38    [class] => application/java39    [tar] => application/x-tar40    [zip] => application/zip41    [gz|gzip] => application/x-gzip42    [rar] => application/rar43    [7z] => application/x-7z-compressed44    [exe] => application/x-msdownload45    [doc] => application/msword46    [pot|pps|ppt] => application/vnd.ms-powerpoint47    [wri] => application/vnd.ms-write48    [xla|xls|xlt|xlw] => application/vnd.ms-excel49    [mdb] => application/vnd.ms-access50    [mpp] => application/vnd.ms-project51    [docx] => application/vnd.openxmlformats-officedocument.wordprocessingml.document52    [docm] => application/vnd.ms-word.document.macroEnabled.1253    [dotx] => application/vnd.openxmlformats-officedocument.wordprocessingml.template54    [dotm] => application/vnd.ms-word.template.macroEnabled.1255    [xlsx] => application/vnd.openxmlformats-officedocument.spreadsheetml.sheet56    [xlsm] => application/vnd.ms-excel.sheet.macroEnabled.1257    [xlsb] => application/vnd.ms-excel.sheet.binary.macroEnabled.1258    [xltx] => application/vnd.openxmlformats-officedocument.spreadsheetml.template59    [xltm] => application/vnd.ms-excel.template.macroEnabled.1260    [xlam] => application/vnd.ms-excel.addin.macroEnabled.1261    [pptx] => application/vnd.openxmlformats-officedocument.presentationml.presentation62    [pptm] => application/vnd.ms-powerpoint.presentation.macroEnabled.1263    [ppsx] => application/vnd.openxmlformats-officedocument.presentationml.slideshow64    [ppsm] => application/vnd.ms-powerpoint.slideshow.macroEnabled.1265    [potx] => application/vnd.openxmlformats-officedocument.presentationml.template66    [potm] => application/vnd.ms-powerpoint.template.macroEnabled.1267    [ppam] => application/vnd.ms-powerpoint.addin.macroEnabled.1268    [sldx] => application/vnd.openxmlformats-officedocument.presentationml.slide69    [sldm] => application/vnd.ms-powerpoint.slide.macroEnabled.1270    [onetoc|onetoc2|onetmp|onepkg] => application/onenote71    [odt] => application/vnd.oasis.opendocument.text72    [odp] => application/vnd.oasis.opendocument.presentation73    [ods] => application/vnd.oasis.opendocument.spreadsheet74    [odg] => application/vnd.oasis.opendocument.graphics75    [odc] => application/vnd.oasis.opendocument.chart76    [odb] => application/vnd.oasis.opendocument.database77    [odf] => application/vnd.oasis.opendocument.formula78    [wp|wpd] => application/wordperfect79)

上面的內(nèi)容，大家看了可能眼花繚亂，其實只要記住，在每一行中，左邊中括號中的名稱是文件的后綴名（或者叫擴(kuò)展名），右邊 => 后面的名稱代表的是后綴名所在應(yīng)的文件MIME信息，這個我們不用管。

     現(xiàn)在言歸正傳，如果想禁止用戶在WordPress后臺發(fā)表文章時上傳特定后綴名的文件，我們可以在當(dāng)前主題的functions.php中添加以下php代碼：

1add_filter('upload_mimes', 'custom_upload_mimes');2 3function custom_upload_mimes($existing_mimes=array() ) {4  // 注意中括號中的名稱，必須取自上面支持列表中中括號內(nèi)的名稱5  unset( $existing_mimes['exe'] ); //此處禁止了上傳exe后綴名的文件6 7  return$existing_mimes; 8}

如果想禁止上傳更多后綴名的文件，可以復(fù)制第5行的代碼，粘貼到第5行代碼以后，第7行代碼之前，把其中的exe，改成要禁止上傳的后綴名即可，如：

01add_filter('upload_mimes', 'custom_upload_mimes');02 03function custom_upload_mimes($existing_mimes=array() ) {04  // 注意中括號中的名稱，必須取自上面支持列表中中括號的名稱05  unset( $existing_mimes['exe'] ); //此處禁止了上傳exe后綴名的可運(yùn)行文件06  unset($existing_mimes['jpg|jpeg|jpe'] ); //此處禁止了上傳jpg、jpeg和jpe后綴名的壓縮文件07  unset( $existing_mimes['gif'] ); //此處禁止了上傳gif后綴名的圖片文件08  unset($existing_mimes['png'] ); //此處禁止了上傳png后綴名的圖片文件09 10  return$existing_mimes; 11}

經(jīng)過此項設(shè)置，用戶如果在后臺上傳禁止的文件類型，那么會得到這樣的提示：