elgavon Realistically, search based on file text content won't be a feature any time soon unfortunately.
There are two types of search:
1. Search by file name. Relatively fast on SSD disks, and this could be done by PHP in real-time, although there might be some performance benefit from pre-indexing data into a database or datafile.json.
2. Search by file content. This is a very slow process, because PHP would have to open/close all files to search for given text, and then search for text inside each file. This would be way too slow in real-time, and would require a database. The database would then need to get indexed at some point, storing all the text from all documents in the file structure.
I will be adding #1 in the near future, but #2 is currently beyond the scope of Files Gallery.