/**
* @par
am int $randLength 长度
* @param int $addtime
是否加入时间戳
* @param int $format 0:只字符 1:字符和数字 2:只数字
* @return string
*/
function getRandStr($randLength=6,$addtime=1,$format=0)
{
case ‘0‘:
$chars=‘
abcdefghijklmnopqrstuvwxyz‘;
case ‘1‘:
$chars=‘abcdefghijklmnopqrstuvwxyzABCDEFGHJKLMNPQEST123456789‘;
break;
case ‘2‘:
$chars=‘0123456789‘;
break;
default:
$chars=‘abcdefghijklmnopqrstuvwxyzABCDEFGHJKLMNPQEST123456789‘;
break;
}
$randStr=‘‘;
for ($i=0;$i<$randLength;$
i++) {
$randStr.=$chars[rand(0,$len-1)];
}
if ($addtime) {
$tokenvalue=time().$randStr;
}
return $tokenvalue;
}