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.
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.
##Example
The execution output of the above program is: <?php
$bytes = random_bytes(5);
print(bin2hex($bytes));
?>
6f36d48a29
random_int()Syntax format
int random_int ( int $min , int $max )
Parametersmin - 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 .
- Returns an int number within the specified range.
Example
The execution output of the above program is: <?php
print(random_int(100, 999));
print(PHP_EOL);
print(random_int(-1000, 0));
?>
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