php-binary

A PHP library for parsing structured binary streams.

Documentation

Documentation can be found in the documentation directory, as well as online at php-binary.damow.net

Usage

Here is an example binary format:

1. 4 bytes of text.
2. 1 byte unsigned integer.
3. A field of 2 bytes of text followed by a 1 byte unsigned integer; repeated n times, where n is a backreference to the byte described in point 2.

Writing a Parser Schema

This format can be parsed as follows. In this example, the schema is described using JSON for clarity, though in practise any array may be used.

$builder = new Binary\SchemaBuilder;
$schema = $builder->createFromArray(json_decode('

    {
       "sometext": {
           "_type": "Text",
           "size": 4
       },
       "somebyte": {
           "_type": "UnsignedInteger",
           "size": 1
       },
       "somefields": {
           "_type": "Compound",
           "count": "@somebyte",
           "_fields": {
               "footext": {
                   "_type": "Text",
                   "size": 2
               },
               "foobyte": {
                   "_type": "UnsignedInteger",
                   "size": 1
               }
           }
       }
    }

', true));

Parsing a Stream

You can have php-binary parse a generic stream of bytes and output fields as an associative array matching your schema definition.

$stream = new Binary\Stream\StringStream("FOOO\x03LOLLOMLON");
$result = $schema->readStream($stream);

The resulting associative array in $result (shown here as JSON for clarity) would contain:

{
    "sometext": "FOOO",
    "somebyte": 3,
    "somefields": [
        {
            "footext": "LO",
            "foobyte": 76
        },
        {
            "footext": "LO",
            "foobyte": 77
        },
        {
            "footext": "LO",
            "foobyte": 78
        }
    ]
}