Generate a random integer

# rand

(PHP 4, PHP 5, PHP 7)

rand — Generate a random integer

### Descrierea

rand ( void ) : int
rand ( int `$min` , int `$max` ) : int

If called without the optional `min`, `max` arguments rand() returns a pseudo-random integer between 0 and getrandmax(). If you want a random number between 5 and 15 (inclusive), for example, use rand(5, 15).

Precauţie

Această funcție nu generează valori securizate din punct de vedere criptografic și deci nu trebuie utilizată pentru scopuri criptografice. Dacă aveți nevoie de o valoare securizată din punct de vedere criptografic considerați utilizarea random_int(), random_bytes() sau openssl_random_pseudo_bytes() în schimb.

> Notă: On some platforms (such as Windows), getrandmax() is only 32767. If you require a range larger than 32767, specifying `min` and `max` will allow you to create a range larger than this, or consider using mt_rand() instead.

> Notă: As of PHP 7.1.0, rand() uses the same random number generator as mt_rand(). To preserve backwards compatibility rand() allows `max` to be smaller than `min` as opposed to returning `FALSE` as mt_rand().

### Parametri

`min`

  The lowest value to return (default: 0)

`max`

  The highest value to return (default: getrandmax())

### Valorile întoarse

A pseudo random value between `min` (or 0) and `max` (or getrandmax(), inclusive).

### Istoricul schimbărilor

Versiune | Descriere
--- | ---
7.2.0 | rand() has received a bug fix for a modulo bias bug. This means that sequences generated with a specific seed may differ from PHP 7.1 on 64-bit machines.
7.1.0 | rand() has been made an alias of mt_rand().

### Exemple

Example #1 rand() example

`<?php
echo rand() . "\n";
echo rand() . "\n";
echo rand(5, 15);
?>`

Exemplul de mai sus va afișa ceva similar cu:

    7771
    22264
    11

### Note

Avertizare

`min` `max` range must be within the range getrandmax(). i.e. (`max` - `min`) <= getrandmax() Otherwise, rand() may return poor-quality random numbers.

### A se vedea și

- srand() - Seed the random number generator
- getrandmax() - Show largest possible random value
- mt_rand() - Generate a random value via the Mersenne Twister Random Number Generator
- random_int() - Generates cryptographically secure pseudo-random integers
- random_bytes() - Generates cryptographically secure pseudo-random bytes
- openssl_random_pseudo_bytes() - Generate a pseudo-random string of bytes