Be careful when setting the 'strong' parameter to true.
If you system doesn't have enough entropy your script will block which can cause timeouts in other parts of your code.
In my case, the most serious symptom was my script blocking when trying to read from /dev/random and causing a 'MySQL has gone away' error.
Hopefully this saves someone the trouble when deciding to use /dev/random entropy
OAuthProvider::generateToken
(PECL OAuth >= 1.0.0)
OAuthProvider::generateToken — Generate a random token
Açıklama
Generates a string of pseudo-random bytes.
Bağımsız Değişkenler
-
size -
The desired token length, in terms of bytes.
-
strong -
Setting to
truemeans/dev/randomwill be used for entropy, as otherwise the non-blocking/dev/urandomis used. This parameter is ignored on Windows.
Dönen Değerler
The generated token, as a string of bytes.
Hatalar/İstisnalar
If the strong parameter is true, then an
E_WARNING level error will be emitted when the
fallback rand() implementation is used to fill
the remaining random bytes (e.g., when not enough random data was found,
initially).
Örnekler
Örnek 1 OAuthProvider::generateToken() example
<?php
$p = new OAuthProvider();
$t = $p->generateToken(4);
echo strlen($t), PHP_EOL;
echo bin2hex($t), PHP_EOL;
?>Yukarıdaki örnek şuna benzer bir çıktı üretir:
4 b6a82c27
Notlar
Bilginize:
When not enough random data is available to the system, this function will fill the remaining random bytes using the internal PHP rand() implementation.
Ayrıca Bakınız
- openssl_random_pseudo_bytes() - Yarı-rasgele bayt dizesi üretir
- mcrypt_create_iv() - Rasgele bir kaynaktan bir ilklendirme vektörü (IV) oluşturur
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User Contributed Notes 1 note
carlosouza at me dot com ¶
12 years ago
