CI_Security::get_random_bytes()

get_random_bytes($length)

Parameters:	$length (int) – Output length
Returns:	A binary stream of random bytes or FALSE on failure
Return type:	string

A convenience method for getting proper random bytes via mcrypt_create_iv(), /dev/urandom or openssl_random_pseudo_bytes() (in that order), if one of them is available.

Used for generating CSRF and XSS tokens.

Note

The output is NOT guaranteed to be cryptographically secure, just the best attempt at that.

Links:

http://www.codeigniter.com/user_guide/libraries/security.html#CI_Security::get_random_bytes

doc_CodeIgniter

2016-10-15 16:31:51

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