An php code for generating 16 bit random numbers of two methods

Share 1 code for php to generate 16-bit random numbers and 2 methods for php to generate random numbers.

Method 1

<?php

$a = mt_rand(10000000,99999999);

$b = mt_rand(10000000,99999999);

echo $a.$b;

Method 2:

<?php
$a = range(0,9);
for($i=0;$i<16;$i++){
$b[] = array_rand($a);
} // www.yuju100.com
var_dump(join("",$b));
// Results string(16) "0179571910024734"