'Live modification/creation of file/data with pure php

For example enter image description here

[['Inflammation'],['Noxious stimuli cause resident effector cells to secrete cytokines<br>Cytokines ↑ vascular dilation & permeability<br>Calor, dolor, penuria, rubor & tumor ensue.',],["Haematology","Immunology","Leukocyte","Cytokine"]],

[[TITLE/NAMES],[DATA],[TAGS]]

How can I have multiple users be able to edit this, similar to google docs; if an edit function is ran by the user.

Is this possible with pure php? Are there any other ways to do this without the use of a database? So far everything is being done via js/jquery; I am open to alternatives; though am looking for the simplest possible way.



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