php代码
<?php
/**
*生成随机数
*@param
*/
function randstr($m = 5) {
$new_str = '';
$str = 'abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwsyz0123456789';
for ($i = 1; $i <= $m; ++$i) {
$new_str .=$str[mt_rand(0, 61)];
}
return $new_str;
}
//测试
$str = randstr(6);
echo $str;