Random\Randomizer::getBytesFromString
(PHP 8 >= 8.3.0)
Random\Randomizer::getBytesFromString — Get random bytes from a source string
Açıklama
Generates a string containing uniformly selected random bytes from the
input string with the requested length.
The chance for a byte to be selected is proportional to its share
of the input string. If each byte occurs
the same amount of times, each byte is equally likely to be selected.
Bağımsız Değişkenler
Dönen Değerler
A string containing the requested number of random bytes taken from the input string.
Hatalar/İstisnalar
-
If
stringis empty, a ValueError will be thrown. -
If the value of
lengthis less than1, a ValueError will be thrown. -
İlgili
Random\Randomizer::$enginemotorunun Random\Engine::generate() yöntemi tarafından yavrulanan Throwable nesneleri.
Örnekler
Örnek 1 Random\Randomizer::getBytesFromString() example
<?php
$randomizer = new \Random\Randomizer();
printf(
"%s.example.com",
$randomizer->getBytesFromString('abcdefghijklmnopqrstuvwxyz0123456789', 16)
);
?>Yukarıdaki örnek şuna benzer bir çıktı üretir:
3zsw04eiubcf82jd.example.com
Örnek 2 Generate a random code for multi-factor authentication
<?php
// The Secure engine is the default, but we make it explicit, because
// multi-factor codes are security sensitive.
$randomizer = new \Random\Randomizer(new \Random\Engine\Secure());
echo implode('-', str_split($randomizer->getBytesFromString('0123456789', 20), 5));
?>Yukarıdaki örnek şuna benzer bir çıktı üretir:
11551-80418-27047-42075
Örnek 3 Select from a string with a non-uniform distribution
<?php
$randomizer = new \Random\Randomizer();
echo $randomizer->getBytesFromString('aaaaabcdef', 20);
?>Yukarıdaki örnek şuna benzer bir çıktı üretir:
fddacbeaaeaaacaaaaca
Ayrıca Bakınız
- Random\Randomizer::getBytes() - Get random bytes
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