PHP Class random number

Question

What i want to do:

Generate single random number which will be passed to functions inside the class.

In other words while calling $this->random both one() and two() should return same value

What is actually happening:

I have multiple random numbers because rand() is getting called multiple times

Important notes:

I want to avoid storing the number inside the session or SQL

How does my code look:

    class Install
    {
        private $random= '';

        public function __construct()
        {
            $this->random = rand(pow(10, 4-1), pow(10, 4)-1);

        }

         public function one()
         {
           echo $this->random; //example value = 3304
         }

         public function two()
         {
           echo $this-random; //example value = 2504
         }

    }

Do you have any particular reason for ruling out the two best options, session and SQL? Because you have to store them somewhere. — Sammitch
– Sammitch, Commented Mar 19, 2020 at 18:47
Because of sensitivity issue of the token i do not want to pass it to the user browser and because token is temporary and it can be many i do not want to store it in DB as well. Is not there a way to fix the variable after generation and pass it to the functions ? — George Samarguliani
– George Samarguliani, Commented Mar 19, 2020 at 18:48
Wait, do you just want the value to be static across all instances of the class? The code you've provided doesn't do what you claim, and your description is lacking in detail. — Sammitch
– Sammitch, Commented Mar 19, 2020 at 18:53
@Sammitch So basically what i need is to have same random value in both one() and two() functions. i will take a better look on how the session works as well. — George Samarguliani
– George Samarguliani, Commented Mar 19, 2020 at 19:08

Sammitch · Accepted Answer · 2020-03-19 19:15:16Z

If you just want a consistent random number across both function calls to the same instance in the same request, then your code will work as-is.

If you just want a consistent random number across both function calls to the same instance in the different requests, then you need to use some form of persistent storage like the Session or a DB.

If you just want a consistent random number across both function calls to the different instances in the same request, then you need a class static variable.

class StaticRandom {
    private static $rand = NULL;

    public static function getRand() {
        if( is_null(self::$rand) ) {
            // this is also where you wouldput the session/DB bits if you
            // want to persist across requests.
            self::$rand = rand(pow(10, 4-1), pow(10, 4)-1);
        }
        return self::$rand;
    }

    public function instanceMethodOne() {
        return self::getRand();
    }

    public function instanceMethodTwo() {
        return self::getRand();
    }
}

$a = new StaticRandom();
$b = new StaticRandom();

var_dump(
    $a->instanceMethodOne(),
    $b->instanceMethodTwo()
);

Output:

int(4188)
int(4188)

Collectives™ on Stack Overflow

PHP Class random number

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related