How to store data of different type's in one single file?

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Problem

For my current project, i need to store images, serialized objects and so on, within a single file with an underlining file-structure. This whole procedure is new to me, because of my php background.

Question

What are good reads to that topic and what is the "best practice" for those kind of things?

Remark

The user should still be able to manipulate the data, i he/she likes to.

asked 35 secs ago

BrainInBlack

57

How to store data of different type's in one single file?