PHP CSPRNG

CSPRNG (Cryptographically Secure Pseudo-Random Number Generator, pseudo-random number generator).

PHP 7 provides a simple mechanism for generating cryptographically strong random numbers by introducing several CSPRNG functions.

• random_bytes()- Cryptographically protected pseudo-random string.

• random_int()- Cryptographically protected pseudo-random integer.

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random_bytes()

Syntax format

string random_bytes ( int $length )

Parameters

• length- The number of bytes returned by the random string.

Return value

• Returns a string and accepts an int type input parameter representing the number of bytes of the returned result.

The execution output of the above program is:

6f36d48a29

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random_int()

Syntax format

int random_int ( int $min , int $max )

Parameters

• min- The minimum value returned must be greater than or equal to PHP_INT_MIN.

• max- The maximum value returned, must be less than or equal to PHP_INT_MAX .

Return value

• Returns an int number within the specified range.

The execution output of the above program is:

723 -64