生成随机字符串,包含大写、小写字母、数字php代码
- function randstr($length) {
- $hash = '';
- $chars = 'abcdefghijklmnopqrstuvwxyz0123456789abcdefghijklmnopqrstuvwxyz';
- $max = strlen($chars) - 1;
- mt_srand((double)microtime() * 1000000);
- for($i = 0; $i < $length; $i++) {
- $hash .= $chars[mt_rand(0, $max)];
- }
- return $hash;
- }