function getRandChar($length) { $str = null; $strPol = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz0123456789"; $max = strlen($strPol) - 1; for ($i = 0;$i < $length;$i++) { $str .= $strPol[rand(0, $max)]; } return $str; }
PHP生成自定义长度随机字符串
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