Php mt_rand () random number function

Php Tutorial mt_rand () random number function
Mt_rand () returns a random integer using the mersenne twister algorithm.

Syntax
Mt_rand (min, max) description
If the optional parameters min and max are not provided, mt_rand () returns a pseudo-random number between 0 and rand_max. For example, if you want a random number between 5 and 15 (including 5 and 15), use mt_rand (5, 15 ).

In versions earlier than 3.0.7, max indicates range. In these versions, we need to obtain a random number from 5 to 15, which is the same as the preceding example. The short example is mt_rand (5, 11 ).
*/

$ Rand = mt_rand (0, 1 );
If ($ rand = 0)
 {
$ Array = array (, 30 );
 }
Elseif ($ rand = 1)
 {
$ Array = array (37,400,444 );
 }

Foreach ($ array as $ v => $ vv)
 {
  
Echo "$ vvn ";
 }