PHP 中的 DOCX 文件类型finfo_file是应用程序/zip

就我现在而言，供应商特定的文件类型（vnd.）没有标准化（由任何RFC），因此不受file_info（）的保护。 是一个压缩的xml格式，这就是原因，为什么返回（完全正确）。您可以解压缩文件并测试结果的哑剧类型，但这将导致文档使用的（也是完全正确的）和其他文件。为了在不同的XML格式之间做出差异，必须分析其内容，并且必须知道它的外观，以及什么。.docxfile_info()application_zipxmlfile_info()

这在 debian 上是有效的。将此添加到 /etc/magic：

#------------------------------------------------------------------------------
# $File: msooxml,v 1.1 2011/01/25 18:36:19 christos Exp $
# msooxml:  file(1) magic for Microsoft Office XML
# From: Ralf Brown <ralf.brown@gmail.com>

# .docx, .pptx, and .xlsx are XML plus other files inside a ZIP
#   archive.  The first member file is normally "[Content_Types].xml".
# Since MSOOXML doesn't have anything like the uncompressed "mimetype"
#   file of ePub or OpenDocument, we'll have to scan for a filename
#   which can distinguish between the three types

# start by checking for ZIP local file header signature
0               string          PK\003\004
# make sure the first file is correct
>0x1E           string          [Content_Types].xml
# skip to the second local file header
#   since some documents include a 520-byte extra field following the file
#   header,  we need to scan for the next header
>>(18.l+49)     search/2000     PK\003\004
# now skip to the *third* local file header; again, we need to scan due to a
#   520-byte extra field following the file header
>>>&26          search/1000     PK\003\004
# and check the subdirectory name to determine which type of OOXML
#   file we have
>>>>&26         string          word/           Microsoft Word 2007+
!:mime application/msword
>>>>&26         string          ppt/            Microsoft PowerPoint 2007+
!:mime application/vnd.ms-powerpoint
>>>>&26         string          xl/             Microsoft Excel 2007+
!:mime application/vnd.ms-excel
>>>>&26         default         x               Microsoft OOXML
!:strength +10

然后，告诉php使用/etc/magic，因为它是数据库：

$finfo = finfo_open(FILEINFO_MIME,"/etc/magic");