PHP Manual: Generate a random token

Description

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

Generates a string of pseudo-random bytes.

Parameters

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.

Return Values

The generated token, as a string of bytes.

Errors/Exceptions

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).

Examples

Example #1 OAuthProvider::generateToken example

<?php
$p = new OAuthProvider();

$t = $p->generateToken(4);

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

?>

The above example will output something similar to:

4
b6a82c27

Notes

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

OAuthProvider::generateToken