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一个php生成16位随机数的代码(两种方法),16位随机数

分享一个php生成16位随机数的代码,php生成随机数的二种方法。

方法1

复制代码 代码如下:


$a = mt_rand(10000000,99999999);
$b = mt_rand(10000000,99999999);
echo $a.$b;


方法2:

<&#63;php
$a = range(0,9);
for($i=0;$i<16;$i++){
$b[] = array_rand($a);
} // www.yuju100.com
var_dump(join("",$b));
//结果string(16) "0179571910024734"

php 怎生成16位随机数?只有数字

有点投机取巧的意味
 

一个生成四位随机数的PHP代码

纯数字的四位随机数
rand(1000,9999)
数字和字符混搭的四位随机字符串:

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 {
$output .= $chars[mt_rand(0, $charsLen)];
}
return $output;
}
echo GetRandStr(4);
 

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