This article 解释一种方法，在该方法中，可以将文件类型添加到允许的文件类型列表中。

将以下代码复制并粘贴到functions.php:

add_filter(\'upload_mimes\', \'custom_upload_mimes\');
function custom_upload_mimes ( $existing_mimes=array() ) {
    // add your extension to the array
    $existing_mimes[\'prc\'] = \'application/x-mobipocket-ebook\';

    // add as many as you like
    // and return the new full result
    return $existing_mimes;
}

在主题中添加以下代码functions.php 文件我已经测试了代码，并且工作正常。

// Add the filter
add_filter(\'upload_mimes\', \'custom_upload_mimes\');

function custom_upload_mimes ( $existing_mimes=array() ) {

    // Add file extension \'extension\' with mime type \'mime/type\'
    $existing_mimes[\'prc\'] = \'application/x-mobipocket\'; 

    // and return the new full result
    return $existing_mimes; 
}