Random\Randomizer::shuffleBytes

(PHP 8 >= 8.2.0)

Random\Randomizer::shuffleBytes — Get a byte-wise permutation of a string

Descrizione

public Random\Randomizer::shuffleBytes(string $bytes): string

Returns a uniformly selected permutation of the input bytes.

Each possible permutation of the input bytes is equally likely to be returned.

Elenco dei parametri

bytes

The string whose bytes are shuffled.

The input string will not be modified.

Valori restituiti

A permutation of the bytes of bytes.

Errori/Eccezioni

Any Throwables thrown by the Random\Engine::generate() method of the underlying Random\Randomizer::$engine.

Esempi

Example #1 Random\Randomizer::shuffleBytes() example

<?php
$r = new \Random\Randomizer();

// Shuffle bytes in a string:
echo "«", $r->shuffleBytes("PHP is great!"), "»\n";
?>

Il precedente esempio visualizzerà qualcosa simile a:

« ga rHs!PPiet»

Example #2 Byte-wise shuffling breaks Unicode characters

<?php
$r = new \Random\Randomizer();

$unicode = "🍎, 🥝, 🍌, 🍑, 🍇";
$shuffled = $r->shuffleBytes( $unicode );

// Byte-wise shuffling of non-ASCII characters destroys them,
// resulting in invalid sequences (indicated by the Unicode
// replacement character) or even entirely different characters
// appearing in the output.
echo "Original: ", $unicode, "\n";
echo "Shuffled: «", $shuffled, "»\n";
echo "Shuffled Bytes: ", bin2hex($shuffled), "\n";
?>

Il precedente esempio visualizzerà qualcosa simile a:

Original: 🍎, 🥝, 🍌, 🍑, 🍇
Shuffled: «� ��,�����🍟,� �� �, �,��»
Shuffled Bytes: 87208e912c8d9fa5f0f0f09f8d9f2cf09f208c9d20f02c209f2c8d8d