RFC 1751¶

RFC 1751 encoder and decoder library for PHP.

Installation¶

composer require arokettu/rfc1751

Documentation¶

Encoding¶

RFC 1751 algorithm encodes binary data by blocks of 8 bytes into 6 English words:

<?php

\Arokettu\Rfc1751\Rfc1751::encode(hex2bin('EB33F77EE73D4053'));
// 'TIDE ITCH SLOW REIN RULE MOT'

Blocks shorter than 8 bytes will be padded by zeroes:

<?php

$encoded = \Arokettu\Rfc1751\Rfc1751::encode("\xeb");
var_dump($encoded); // "TICK A A A A ACE"
$decoded = \Arokettu\Rfc1751\Rfc1751::decode($encoded);
var_dump(bin2hex($decoded)); // "eb00000000000000"

Decoding¶

Decoding will succeed if

Number of words is divisible by 6 to be able to decode entire blocks.
2-bit checksum (parity) is valid.

<?php

\Arokettu\Rfc1751\Rfc1751::decode('TIDE ITCH SLOW REIN RULE MOT');
// 0xEB33F77EE73D4053

The string is case insensitive and space insensitive:

<?php

\Arokettu\Rfc1751\Rfc1751::decode('   tide ItcH    SLOW Rein   rule moT   ');
// 0xEB33F77EE73D4053

License¶

The library is available as open source under the terms of the MIT License.