/bit-array

A super-fast bit array in PHP

Primary LanguagePHPMIT LicenseMIT

PHP BitArray

A super-fast BitArray for PHP

This project handles super-fast arrays of bits stored internally as integers.

It is as simple as creating the bit array indicating its length. And you are not limited to one integer!

$bitarray = new BitArray(2129);

This package offers methods to get, set and unset bits, and the typical logical bitwise operators and, or, xor and not methods.

You can also fill a bit array with a string where, obviously, only 0's and 1's are allowed.

Installation

Using composer: either

$ composer require oscarpb/bitarray:0.2.0

or create a composer.json file containing

{
    "require": {
        "oscarpb/bitarray": "0.2.0"
    }
}

and run

$ composer install

Create a test.php file containing

<?php
require __DIR__ . '/vendor/autoload.php';

use Oscarpb\Bitarray\BitArray;

$bitarray = new BitArray(8);
$bitarray->setBit(0);
$bitarray->setBit(2);
$bitarray->setBit(4);
$bitarray->setBit(6);
$bitarray->print();

This should print:

01010101

Other options:

<?php
require __DIR__ . '/vendor/autoload.php';

use Oscarpb\Bitarray\BitArray;

$bitarray = new BitArray(8);
$bitarray->setBit(2);
$bitarray->setBit(4);
$bitarray->unsetBit(2);

$bitarray->getBit(4);  // true
$bitarray->getBit(2);  // false (it has been unset)

$bitarray2 = new BitArray(8);
$bitarray2->setBit(7);
$bitarray->not();
$bitarray->and($bitarray2);
$bitarray->or($bitarray2);
$bitarray->xor($bitarray2);

$bitarray3 = new BitArray(8);
$bitarray3->fillFromString($bitarray->print());

See the examples folder for more information.

License

This package is distributed under the MIT license.