如果你需要一个随机字符串,下面这个函数正好帮你,可以自己定义长度
function getCode($length=12) { //Ascii Code for number, lowercase, uppercase and special characters $no = range(48,57); $lo = range(97,122); $up = range(65,90); //exclude character I, l, 1, 0, O $eno = array(48, 49); $elo = array(108); $eup = array(73,79); $no = array_diff($no,$eno); $lo = array_diff($lo,$elo); $up = array_diff($up,$eup); $chr = array_merge($no, $lo, $up); for ($i=1;$i<=$length;$i++) { $code.= chr($chr[rand(0,count($chr)-1)]); } return $code; }