Reading From a Binary File

How To

[Zorth]

Hey,

I have a file with information formatted in Binary, which was saved from a C++ program. It's in a structure with different data types: Strings, integers, more structures...

I use fread() to read each structure, and it returns the binary data, but I can't seem to get it to understand what part of it I want to use.

Any suggestions?

[hakre]

hi zorth,

this is farly a detailed question. first of all you need to know how each part of c++ variable type is saved. i don't know a built in function in php that does a parsing for you, so you need to do it for yourself.

this is quite like building a filefilter for jpeg files or similar. you need to parse the wohle file for datatypes and extract them each.

--hakre

[Zorth]

Let's say I have the memory on an object named $data, how would I go about parsing something simple which contains:

A string of 8 bytes
2 integers of 4 bytes each

?

[Timotheos]

I'm thinking that unpack [php.net] might be what you're after. Have a look at the user notes.