一些PHP写的小东西_PHP教程

一些小东西有时候可能用得上! 


1.得到客户端IP地址 


function getip(){ 
       if (! empty($_SERVER["HTTP_X_FORWARDED_FOR"])){ //使用代理的情况 
               $tip = split(",", $_SERVER["HTTP_X_FORWARDED_FOR"]); 
               $cip = $tip[0]; 
       } 
       else 
               $cip = $_SERVER["REMOTE_ADDR"];[ 
       return dechex(ip2long($cip)); 
} 


2.session控制的函数 


function session_begin(){ 
       global $userid, $sid, $ip, $session, $db, $islogin; 
       $ip = getip(); 
       /* 短期而言,系统默认需要支持cookie. */ 
       if (!isset($_COOKIE['userid'])) return false; 
       else $userid = $_COOKIE['userid']; 
       if (!isset($_COOKIE['sid'])) return false; 
       else $sid = $_COOKIE['sid']; 
       /* 以上返回false意味着用户没有登陆,页面将跳转至首页(登陆页). */ 

       $query = "SELECT * FROM user WHERE nickname = '$userid'"; 
       $result = $db->sql_query($query); 
       if ($row = $db->sql_fetchrow($result)){ 
               if ($row['sid'] != $sid) return false; /* cookie传送的sid和数据库保存的不吻合 */ 
               if ($row['lastloginip'] != $ip) return false; /* IP不吻合 */ 
               /* 是否要考虑 session的过期 问题呢? */ 
       } 
       else return false; /* 没有这个userid */ 
       $session = $row; 
//        $session[''] = $row['']; 
       unset($row); 

       $islogin = true; 
       return true; 
} 

/* bool session_end(int $userid, string $sid) */ 
function sesssion_end($userid, $sid){ 
       return true; 
} 


3.做选美的投票程序 


php 
header("Refresh:0;url=./");  //一秒刷新 
?> 
<script>alert('<?php <BR>require_once('mysql.php'); <BR>require_once('functions.php'); <BR>$db = new sql_db('localhost','root','','selectmm'); <BR>$user_id = $_GET['user_id']; <BR>$ip = getip(); <BR>$deltime = time()-3600; //减去一小时 <BR>$sql = "delete from vote where time <$deltime"; //删除掉过期的数据 <BR>$db->sql_query($sql); <br><br>$sql = "select ip from vote where ip='$ip' and user_id='$user_id'"; //查看一小时内是否投过 <BR>$linkid=$db->sql_query($sql) or die(mysql_error()); <BR>$count=$db->sql_affectedrows(); <BR>if($count) <BR>{ <BR>echo "您已经投过票了！"; <BR>} <BR>else <BR>{ <BR>$sql = "update user set vote_count=vote_count+1 WHERE user_id='$user_id'"; <BR>$db->sql_query($sql); <BR>$count=$db->sql_affectedrows(); <BR>if($count) <BR>{ <BR> echo "投票成功！"; <BR> $sql = "insert into vote (`ip`,`user_id`,`time`) values ('$ip','$user_id','".time()."')";//投票成功就插入一条记录。 <BR> $db->sql_query($sql); <br><br>} <BR>else <BR>{ <BR> echo "投票失败！"; <BR>} <br><br>} <BR>?>'); <BR>//history.back(); <BR></script> 


4.smarty的搜索程序 


require_once('mysql.php'); 
$db = new sql_db('localhost','root','','selectmm'); 
require_once('functions.php'); 
require_once('session.php'); 
session_begin(); 
require('./Libs/Smarty.class.php'); 
$smarty = new Smarty; 
$title = "首页"; 
$smarty->assign("islogin",$islogin); 
$smarty->assign("title",$title); 
$age=$_GET['age']; 
$arr=explode(',',$age); 
$y=date('Y'); 
$md=date('-m-d'); 
$begin=($y-$arr[1]).$md; 
$end=($y-$arr[0]).$md; 
$sql="select p.* from pic_info p,user u where p.user_id=u.user_id and u.birthday between '$begin' and '$end' group by u.user_id"; 
$link=$db->sql_query($sql) or die(mysql_error()); 
$row = $db->sql_fetchrowset($link); 
$db->sql_freeresult(); 
$smarty->assign("pic",$row); 
$smarty->display('index.tpl.htm'); 
?> 


5.注册程序 


 
require('mysql.php'); 
$str=new sql_db('localhost','root','','selectmm'); 
$METHOD = $_POST; 
   if (isset($METHOD['nickname']) && $METHOD['nickname'] != '') $nickname = $METHOD['nickname']; 
  else { echo "<script>alert("用户昵称不能为空.")</script>"; echo "<script>location="register.php"</script>"; } 
   if (isset($METHOD['password']) && strlen($METHOD['password'])>=6) $password = $METHOD['password']; 
  else { echo "<script>alert("密码至少6位")</script>"; echo ""; } 
   $password2 = $METHOD['password2']; 
   if ($password != $password2) 
  { echo "<script>alert("两次输入密码不一致")</script>"; echo "<script>location="register.php"</script>"; } 
   if (isset($METHOD['name']) && $METHOD['name'] != '') $name = $METHOD['name']; 
  else { echo "<script>alert("用户名不能为空.")</script>"; echo "<script>location="register.php"</script>"; } 
    $birthday=$METHOD['Year'].$METHOD['Month'].$METHOD['Day']; 
    $stature = $METHOD['stature']; 
    $astrology = $METHOD['astrology']; 
    $bloodtype = $METHOD['bloodtype']; 
    $goodat = $METHOD['goodat']; 
    $work = $METHOD['work']; 
    $educate = $METHOD['educate']; 
    $homeplace = $METHOD['homeplace']; 
    $address = $METHOD['address']; 
    $tel = $METHOD['tel']; 
    $qq = $METHOD['qq']; 
   if (isset($METHOD['email']) && $METHOD['email'] != '') $email = $METHOD['email']; 
  else { echo "<script>alert("Email不能为空")</script>"; echo "<script>location="register.php"</script>"; } 
   if (!eregi("^[0-9a-z.-_]+@[0-9a-z.]+.[a-z]$",$email)) { echo "<script>alert("电子邮件格式不合法")</script>"; echo "<script>location="register.php"</script>"; } 
     $dian =$METHOD['dian']; 
   if (isset($METHOD['myself']) && $METHOD['myself'] != '') $myself = $METHOD['myself']; 
  else { echo "<script>alert("用.....不能为空")</script>"; echo "<script>location="register.php"</script>"; } 
   if(isset($METHOD['enounce'])&& $METHOD['enounce']!='')$enounce = $METHOD['enounce']; 
   else { echo "<script>alert(".....不能为空")</script>"; echo "<script>location="register.php"</script>"; } 


   $query = "SELECT * FROM user WHERE nickname ='$nickname' or email='$email'"; 
   $result = $str->sql_query($query)or die(mysql_error()); ; 
   if ($row = $str->sql_fetchrow($result)) 
    { echo "<script>alert("对不起，该用户已经注册")</script>"; echo "<script>location="register.php"</script>"; } 
   $password = md5($password); 
   $query = "INSERT INTO `user` (`nickname`,`password`,`name`,`birthday`,`astrology`,`bloodtype`,`stature`,`goodat`,`work`,`educate`,`homeplace`,`address`,`tel`,`email`,`qq`,`dian`,`myself`,`enounce`) VALUES('$nickname','$password','$name','$birthday','$astrology','$bloodtype','$stature','$goodat','$work','$educate','$homeplace','$address','$tel','$email','$qq','$dian','$myself','$enounce')"; 
if($str->sql_query($query)) 
     $str->sql_close(); 
   echo "<script>alert("恭喜你，注册成功")</script>"; 

   echo "<script>location="login.php"</script>"; 
?> 


6.提交参数 JS控制 


echo "