(PHP 4, PHP 5, PHP 7)
mt_rand — Generate a better random value
$min
, int $max
)Many random number generators of older libcs have dubious or unknown characteristics and are slow. By default, PHP uses the libc random number generator with the rand() function. The mt_rand() function is a drop-in replacement for this. It uses a random number generator with known characteristics using the » Mersenne Twister, which will produce random numbers four times faster than what the average libc rand() provides.
If called without the optional min,
max arguments mt_rand()
returns a pseudo-random value between 0 and
mt_getrandmax(). If you want a random number
between 5 and 15 (inclusive), for example, use mt_rand(5,
15).
Bu işlev kriptografik olarak güvenilir değerler üretmez ve kriptografik amaçlarla kullanılmamalıdır. Kriptografik olarak güvenilir bir değere ihtiyaç duyuyorsanız bunun yerine random_int(), random_bytes() veya openssl_random_pseudo_bytes() işlevini deneyebilirsiniz.
minOptional lowest value to be returned (default: 0)
maxOptional highest value to be returned (default: mt_getrandmax())
A random integer value between min (or 0)
and max (or mt_getrandmax(), inclusive),
or FALSE if max is less than min.
| Sürüm: | Açıklama |
|---|---|
| 5.3.4 |
Issues an E_WARNING and returns FALSE if
max < min.
|
Örnek 1 mt_rand() example
<?php
echo mt_rand() . "\n";
echo mt_rand() . "\n";
echo mt_rand(5, 15);
?>
Yukarıdaki örnek şuna benzer bir çıktı üretir:
1604716014 1478613278 6
min max range must
be within the range mt_getrandmax(). i.e. (max -
min) <= mt_getrandmax()
Otherwise, mt_rand() may return poor random numbers
than it should be.