Question

php随机生成字符

以上代码为按“顺序生成”0到z的字符，如：已生成字符为a，下次生成字符则为b；已生成字符为ac，下次生成字符为则ab

请帮忙将“顺序生成”改为“随机生成”0到z的字符，位数为3位。

源码无法正常发出来，若需要，请Hi我 . 谢谢！

Answer 1

<?php
function yourls_get_shorturl_charset($length = 3){
    $seeds = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
    $str = '';
    $seeds_count = strlen ( $seeds );
    for($i = 0; $length > $i; $i ++) {
    $str .= $seeds {mt_rand ( 0, $seeds_count - 1 )};
    }
    return $str;
}
?>

Answer 2

<?php
function yourls_get_shorturl_charset($length = 3){
    $seeds = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
    $str = '';
    $seeds_count = strlen ( $seeds );
    for($i = 0; $length > $i; $i ++) {
    $str .= $seeds {mt_rand ( 0, $seeds_count - 1 )};
    }
    return $str;
}
?>

Answer 3

非要改上面的代码吗，可以自己写啊

Answer 4

echo substr(md5(rand(0,99999)),0,3)