WordPress 限制不同用户角色可上传的文件类型及大小【三角洲行动直装科技】

开放注册的限型及WordPress站点，一般都会根据不同等级的同用用户角色来赋予不同的权限。文件上传功能就是户角一个比较常用的功能，那么，色可上传三角洲行动直装科技如何限制不同用户角色可上传的限型及文件类型及大小呢？下面倡萌就来说说这个问题。让用户拥有上传文件的同用三角洲行动加速软件权限默认情况下，有些用户是户角不允许上传文件的，你可以在主题的色可上传 functions.php 添加下面的代码：//允许用户投稿时上传文件 if ( current_user_can(contributor) && !current_user_can(upload_files) ) add_action(admin_init, allow_contributor_uploads); function allow_contributor_uploads() { $contributor = get_role(contributor); $contributor->add_cap(upload_files); } 上面的代码就是给 contributor 这个用户角色添加了 upload_files （上传文件）的权限。限制用户上传文件的限型及类型首先，大家可以先了解一下 WordPress 默认允许上传的同用文件类型，打开WordPress的户角 /wp-includes/functions.php 文件，然后搜索 function wp_get_mime_types 定位到那里，色可上传你就会看到详细的限型及三角洲行动直装软件文件类型：function wp_get_mime_types() { // Accepted MIME types are set here as PCRE unless provided. return apply_filters( mime_types, array( // Image formats jpg|jpeg|jpe => image/jpeg, gif => image/gif, png => image/png, bmp => image/bmp, tif|tiff => image/tiff, ico => image/x-icon, // Video formats asf|asx|wax|wmv|wmx => video/asf, avi => video/avi, divx => video/divx, flv => video/x-flv, mov|qt => video/quicktime, mpeg|mpg|mpe => video/mpeg, mp4|m4v => video/mp4, ogv => video/ogg, mkv => video/x-matroska, // Text formats txt|asc|c|cc|h => text/plain, csv => text/csv, tsv => text/tab-separated-values, ics => text/calendar, rtx => text/richtext, css => text/css, htm|html => text/html, // Audio formats mp3|m4a|m4b => audio/mpeg, ra|ram => audio/x-realaudio, wav => audio/wav, ogg|oga => audio/ogg, mid|midi => audio/midi, wma => audio/wma, mka => audio/x-matroska, // Misc application formats rtf => application/rtf, js => application/javascript, pdf => application/pdf, swf => application/x-shockwave-flash, class => application/java, tar => application/x-tar, zip => application/zip, gz|gzip => application/x-gzip, rar => application/rar, 7z => application/x-7z-compressed, exe => application/x-msdownload, // MS Office formats doc => application/msword, pot|pps|ppt => application/vnd.ms-powerpoint, wri => application/vnd.ms-write, xla|xls|xlt|xlw => application/vnd.ms-excel, mdb => application/vnd.ms-access, mpp => application/vnd.ms-project, docx => application/vnd.openxmlformats-officedocument.wordprocessingml.document, docm => application/vnd.ms-word.document.macroEnabled.12, dotx => application/vnd.openxmlformats-officedocument.wordprocessingml.template, dotm => application/vnd.ms-word.template.macroEnabled.12, xlsx => application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, xlsm => application/vnd.ms-excel.sheet.macroEnabled.12, xlsb => application/vnd.ms-excel.sheet.binary.macroEnabled.12, xltx => application/vnd.openxmlformats-officedocument.spreadsheetml.template, xltm => application/vnd.ms-excel.template.macroEnabled.12, xlam => application/vnd.ms-excel.addin.macroEnabled.12, pptx => application/vnd.openxmlformats-officedocument.presentationml.presentation, pptm => application/vnd.ms-powerpoint.presentation.macroEnabled.12, ppsx => application/vnd.openxmlformats-officedocument.presentationml.slideshow, ppsm => application/vnd.ms-powerpoint.slideshow.macroEnabled.12, potx => application/vnd.openxmlformats-officedocument.presentationml.template, potm => application/vnd.ms-powerpoint.template.macroEnabled.12, ppam => application/vnd.ms-powerpoint.addin.macroEnabled.12, sldx => application/vnd.openxmlformats-officedocument.presentationml.slide, sldm => application/vnd.ms-powerpoint.slide.macroEnabled.12, onetoc|onetoc2|onetmp|onepkg => application/onenote, // OpenOffice formats odt => application/vnd.oasis.opendocument.text, odp => application/vnd.oasis.opendocument.presentation, ods => application/vnd.oasis.opendocument.spreadsheet, odg => application/vnd.oasis.opendocument.graphics, odc => application/vnd.oasis.opendocument.chart, odb => application/vnd.oasis.opendocument.database, odf => application/vnd.oasis.opendocument.formula, // WordPerfect formats wp|wpd => application/wordperfect, ) ); } => 的前面为格式，后面为格式描述。同用如果你要禁止上传其中的户角某些类型，可以参考下面的三角洲行动例子：将下面的代码添加到主题的 functions.php 文件：//禁止上传avi和mp4格式的文件 add_filter(upload_mimes, custom_upload_mimes); function custom_upload_mimes ( $existing_mimes=array() ) { unset ($existing_mimes[avi]); unset ($existing_mimes[mp4]); return $existing_mimes; } 如果你还要禁止更多，可以按照 unset ($existing_mimes[格式]);  样例添加即可。如果你仅仅只需要允许用户上传几种类型而已，还可以通过下面的三角洲行动官网更简洁的方法，代码添加到主题的 functions.php 文件：//只允许上传图片文件 add_filter(upload_mimes, custom_upload_mimes); function custom_upload_mimes ( $existing_mimes=array() ) { unset ($existing_mimes);//禁止上传任何文件 $existing_mimes[jpg|jpeg|gif|png]=image/image;//允许用户上传jpg,gif,png文件 return $existing_mimes; } 如果你还要允许上传其他格式，重复使用 $existing_mimes[格式]=描述;  即可。限制用户上传的三角洲行动辅助文件大小同样在主题的 functions.php 文件中，添加下面的代码：//限制上传文件的最大体积 function max_up_size() { return 500*1024; // 500 kb } add_filter(upload_size_limit, max_up_size); 上面的例子是限制所有用户上传的文件的最大体积为 500 kb （1M =1024*1024）。注意：主机空间和WordPress本身一般设置了允许上传的文件的最大体积，所以在这里设置需要考虑到这点。三角洲行动科技限制不同用户角色可上传的文件类型及大小其实上面已经给出了限制类型和大小的方法，要根据不同用户角色来限制，只需要添加角色判断代码即可。三角洲行动透视倡萌举个综合的例子：//不同用户上传的类型 function custom_upload_mimes ( $existing_mimes=array() ) { unset ($existing_mimes);//禁止上传任何文件 if( current_user_can( publish_posts ) && !current_user_can( publish_pages ) ) { //允许作者（Author）上传的类型 $existing_mimes[jpg|jpeg|gif|png]=image/image;//允许用户上传jpg,gif,png文件 $existing_mimes[zip]=application/zip; //允许用户上传zip压缩包 $existing_mimes[pdf]=application/pdf; //允许用户上传pdf文件 }elseif( current_user_can( edit_posts ) && !current_user_can( publish_posts ) ) { //允许投稿者（Contributor）上传的类型 $existing_mimes[jpg|jpeg|gif|png]=image/image; $existing_mimes[pdf]=application/pdf; }else{ //其他用户角色上传的类型 $existing_mimes[jpg|jpeg|gif|png]=image/image; } return $existing_mimes; } //不同用户上传的大小 function max_up_size() { if( current_user_can( publish_posts ) && !current_user_can( publish_pages ) ) { return 2048*1024; // 允许作者（Author）上传 2M }elseif( current_user_can( edit_posts ) && !current_user_can( publish_posts ) ) { return 1024*1024; // 允许投稿者（Contributor）上传 1M }else{ return 500*1024; // 其他用户角色上传 500 kb } } //只对非管理员执行这两个函数（即：对管理员不生效） if( !current_user_can( manage_options ) ) { add_filter(upload_mimes, custom_upload_mimes); add_filter(upload_size_limit, max_up_size); }。