CREATE TABLE `say` ( 
 `id` int(11) NOT NULL auto_increment, 
 `userid` int(11) NOT NULL default '0', 
 `content` varchar(200) NOT NULL, 
 `addtime` int(10) NOT NULL, 
 PRIMARY KEY (`id`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8; 

/*时间转换函数*/ 
function tranTime($time) { 
 $rtime = date("m-d H:i",$time); 
 $htime = date("H:i",$time); 
 $time = time() - $time; 
 
 if ($time < 60) { 
  $str = '刚刚'; 
 } 
 elseif ($time < 60 * 60) { 
  $min = floor($time/60); 
  $str = $min.'分钟前'; 
 } 
 elseif ($time < 60 * 60 * 24) { 
  $h = floor($time/(60*60)); 
  $str = $h.'小时前 '.$htime; 
 } 
 elseif ($time < 60 * 60 * 24 * 3) { 
  $d = floor($time/(60*60*24)); 
  if($d==1) 
   $str = '昨天 '.$rtime; 
  else 
   $str = '前天 '.$rtime; 
 } 
 else { 
  $str = $rtime; 
 } 
 return $str; 
} 

function formatSay($say,$dt,$uid){ 
 $say=htmlspecialchars(stripslashes($say)); 
 
 return' 
 <div class="saylist"><a href="#"><img src="images/'.$uid.'.jpg" width="50" height="50" 
 alt="demo" /></a> 
 <div class="saytxt"> 
 <p><strong><a href="#">demo_'.$uid.'</a></strong> '. 
preg_replace('/((?:http|https|ftp):\/\/(?:[A-Z0-9][A-Z0-9_-]*(?:\.[A-Z0-9][A-Z0-9_-]*)+): 
?(\d+)?\/?[^\s\"\']+)/i','<a href="$1" rel="nofollow" target="blank">$1</a>',$say).' 
 </p><div class="date">'.tranTime($dt).'</div> 
 </div> 
 <div class="clear"></div> 
 </div>'; 
} 

require_once('connect.php'); //数据库连接文件 
require_once('function.php'); //函数调用文件 
 
$txt=stripslashes($_POST['saytxt']); //获取提交的数据 
$txt=mysql_real_escape_string(strip_tags($txt),$link); //过滤HTML标签，并转义特殊字符 
if(mb_strlen($txt)<1 || mb_strlen($txt)>140) 
 die("0"); //判断输入字符数是否符合要求 
$time=time(); //获取当前时间 
$userid=rand(0,4); 
//插入数据到数据表中 
$query=mysql_query("insert into say(userid,content,addtime)values('$userid','$txt','$time')"); 
if(mysql_affected_rows($link)!=1) 
 die("0"); 
echo formatSay($txt,$time,$userid); //调用函数输出结果 

<?php 
define('INCLUDE_CHECK',1); 
require_once('connect.php'); 
require_once('function.php'); 
 
$query=mysql_query("select * from say order by id desc limit 0,10"); 
while ($row=mysql_fetch_array($query)) { 
 $sayList.=formatSay($row[content],$row[addtime],$row[userid]); 
} 
?> 
<form id="myform" action="say.php" method="post"> 
 <h3><span class="counter">140</span>说说你正在做什么...</h3> 
 <textarea name="saytxt" id="saytxt" class="input" tabindex="1" rows="2" cols="40"></textarea> 
 <p> 
 <input type="submit" class="sub_btn" value="提 交" disabled="disabled" /> 
 <span id="msg"></span> 
 </p> 
</form> 
<div class="clear"></div> 
<div id="saywrap"> 
<?php echo $sayList;?> 
</div>