recently, when you use phpexcel to deal with xlsx files, when the files are downloaded through Wechat, they are always recognized by phpexcel as html files, but they are really xlsx suffixes. They can also be opened normally with wps and displayed with linux file fileName.xlsx HTML document, UTF-8 Unicode text, with very long lines
is this because Wechat was converted during transmission?
version 07, the office format is xml,. Any docx or xlsx can directly change the extension to .zip to open it. It is said that the reason is that 1.xml is smaller and easier to expand. 2, anyway, many competitors are free. Microsoft does not rely on format monopoly to make money, so just open it to everyone. Anyway, I sell online services. 3, the damage is easy to repair. The previous encryption binary system is difficult to repair when it is broken. This xml format is broken and good to repair
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