PHP generates 16-bit random number code (two methods), 16-bit random number _php tutorial

Source: Internet
Author: User

A PHP generates 16-bit random number code (two methods), 16-bit random number

PHP generates 16-bit random numbers of code, and PHP generates two methods of random numbers.

Method 1
$a = Mt_rand (10000000,99999999);
$b = Mt_rand (10000000,99999999);
echo $a. $b;

Method 2:
$a = range (0,9);
for ($i =0; $i <16; $i + +) {
$b [] = Array_rand ($a);
Var_dump (Join ("", $b));
Result String (16) "0179571910024734"

Reference Links:

    • PHP generates several examples of non-repeating random numbers
    • PHP How to generate 6-bit random number, PHP random number example
    • Three ways to generate random numbers in PHP
    • PHP Random number example, PHP background color random display
    • PHP Random number Generation Function Example
    • PHP random number Generation sample code
    • PHP generates random numbers, PHP generates a fixed number of random digits
    • Examples of PHP generating random numbers or strings

How does PHP generate 16-bit random numbers? Only numbers

A bit of an opportunistic means

A PHP code that generates four-bit random numbers

Four-bit random number of pure digits
rand (1000,9999)
number and character mash-up four-bit random string:

Function Getrandstr ($len)
$ chars = Array (
"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K",
"L", "M", "N", "O", "P", "Q", "R", "s", "t "," U "," V ",
" W "," X "," Y "," Z "," A "," B "," C "," D "," E "," F "," G ",
" H "," I "," J "," K "," L "," M "," N "," O "," P ", "Q", "R",
"S", "T", "U", "V", "W", "X", "Y", "Z", "0", "1", "2",
"3", "4", "5", "6", "7", "8", "9"
$charsLen = count ($chars)-1;
Shuffle ($chars);
$output = "";
for ($i =0; $i < $len; $i + +)
$output. = $chars [Mt_rand (0, $charsLen)];
Return $output;
Echo getrandstr (4); true techarticle a PHP generates 16-bit random number code (two methods), 16-bit random number a PHP generated 16-bit random number of code, PHP generates a random number of two ways. Method 1: Php $a = mt_rand (100000 ...

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