如何在不使用rand()函数的情况下获取固定长度的字符串?
我有这个,但我不想使用rand()函数
function generateRandomString($length =6) {
$characters = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
$charactersLength = strlen($characters);
$randomString = '';
for ($j = 0; $j < $length; $j++) {
$randomString .= $characters[mt_rand(0, $charactersLength - 1)];
}
return $randomString;
}
答案 0 :(得分:2)
<?php
$start=0;$length=6;
$str='0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
$Val=substr(str_shuffle($str),$start,$length);
echo $Val;
?>
答案 1 :(得分:1)
arr[:,arr[1,:].argsort()]
在这里你可以调用这个函数为8个字符
SELECT c.name,(select count(*) from article where cid = c.id) as count FROM cat c WHERE 1 GROUP BY c.id
答案 2 :(得分:0)
您可以使用以下代码来获取固定长度的随机字符串
<?php
$str = 'abcdef';
$shuffled = str_shuffle($str);
// this will genrate randome string with fixed string lenght
echo $shuffled;
?>