<?php header("content-type:text/html;charset=utf-8"); $str = uniqid(md5(microtime(true)),true); echo $str; echo "<br/>"; $str1 = uniqid(md5(microtime(true))); echo $str1; ?>
uniqid,md5,microtime
原文：http://www.cnblogs.com/wuheng1991/p/5126343.html
