(PHP 4, PHP 5, PHP 7)
rand — Generate a random integer
$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).
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
minandmaxwill 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
maxto be smaller thanminas opposed to returningFALSEas mt_rand().
minThe lowest value to return (default: 0)
maxThe highest value to return (default: getrandmax())
A pseudo random value between min
(or 0) and max (or getrandmax(), inclusive).
| 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(). |
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
min max range must
be within the range getrandmax(). i.e. (max -
min) <= getrandmax()
Otherwise, rand() may return poor-quality random numbers.