PHP Unconference Europe 2015

OAuthProvider::generateToken

(PECL OAuth >= 1.0.0)

OAuthProvider::generateTokenGenerate a random token

Descrizione

final public static string OAuthProvider::generateToken ( int $size [, bool $strong = false ] )

Generates a string of pseudo-random bytes.

Elenco dei parametri

size

The desired token length, in terms of bytes.

strong

Setting to TRUE means /dev/random will be used for entropy, as otherwise the non-blocking /dev/urandom is used. This parameter is ignored on Windows.

Valori restituiti

The generated token, as a string of bytes.

Errori/Eccezioni

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).

Esempi

Example #1 OAuthProvider::generateToken() example

<?php
$p 
= new OAuthProvider();

$t $p->generateToken(4);

echo 
strlen($t),  PHP_EOL;
echo 
bin2hex($t), PHP_EOL;

?>

Il precedente esempio visualizzerĂ  qualcosa simile a:

4
b6a82c27

Note

Nota:

When not enough random data is available to the system, this function will fill the remaining random bytes using the internal PHP rand() implementation.

Vedere anche:

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User Contributed Notes 1 note

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1
carlosouza at me dot com
2 years ago
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
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