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Example code of g105b/drng

Informations about the package drng

Deterministic random number generator

This library generates byte sequences with the ability to convert to integers and floating points. The sequences generated appear to be random, but can be fully determined by providing a known seed value. The main use of this library is in procedural generation algorithms.

The cryptographic algorithms provided by OpenSSL are used to generate the random data, specifically using the Advanced Encryption Standard (AES) operating in Galois/Counter mode (GCM).

Each instance of the Random class maintains its AES counter, so there is theoretically no limit to the amount of random data produced. The deterministic nature of this library is possible due to the counter's persistence while generating the initialisation vector, along with the encryption key being set from a provided seed value.

Installation

Composer can be used to install this library into your project. composer require g105b/drng will install the latest version. Alternatively, you can modify your project's composer.json manually:

Usage example

Using a string seed to determine the random sequence

string-seed.php:

The above example will always output the same sequence, due to the use of the seed "i like cats":

All versions of drng with dependencies

PHP Build Version
Package Version
Requires php Version >=7.4
ext-openssl Version *
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