Question:
Googling and did not find a solution to the issue, mostly solutions are offered to use the easyXLS library, but as I understand it, it works through COM and therefore is not suitable for Linux hosting. I found a crutch solution in the form of a python library to run this script from PHP, but it returns some kind of garbage in which the last word of the last cell in each line is normally displayed
The XLSB extension is a binary format spreadsheet file created in Microsoft Excel. XLSB files differ from standard Open XML files (.XLSX) in that they store a table using binary format (BIFF12).
Answer:
There are at least two projects on github . True in python . But who's stopping you from calling them from php via exec ? 🙂
https://github.com/galizin/xlsb2csv
https://github.com/orangethakkali/xlsb2csv