本文目录一览：
php实现用户注册和登入，不用做效果求大牛指导
登陆界面 login.php
form action="logincheck.php" method="post"
用户名：input type="text" name="user"/br/
密 码：input type="password" name="pass"/br/
input type="submit" name="sub" value="登陆"/
a href="register.php"注册/a
/form
登陆处理界面logincheck.php
?php
mysql_connect('localhost','root','');
mysql_select_db('test');
mysql_query("set names 'gbk'");
$nsql="select username,passwd,nick from userinfo where username = '$_POST[user]' and passwd = '$_POST[pass]'";
$result = mysql_query($nsql);
$num = mysql_num_rows($result);
if($num){
$row = mysql_fetch_array($result);
echo "欢迎您，$row[2]";
}else{
echo"scriptalert('用户名或密码不正确');history.go(-1);/script";
}
?
注册界面register.php
form action="regcheck.php" method="post"
用户名：input type="text" name="user"/br/
密 码:input type="password" name="pass"/br/
昵 称：input type="text" name="nick"/br/
input type="submit" name="sub" value="注册"/
/form
注册处理界面regcheck.php
?php
mysql_connect('localhost','root','');
mysql_select_db('test');
mysql_query("set names 'gbk'");
$nsql="select username from userinfo where username = '$_POST[user]'";
$result = mysql_query($nsql);
$num = mysql_num_rows($result);
if($num){
echo "scriptalert('用户名已存在注册失败');history.go(-1);/script";
}else{
$isql = "insert into userinfo values('$_POST[user]','$_POST[pass]','$_POST[nick]')";
mysql_query($isql);
echo"scriptalert('注册成功');history.go(-1);/script";
}
?
PHP用户注册及登录模块的思路？
要什么思路？
无非就是构建一个表单，将用户名和密码传递到处理数据的页面，提交的时候用隐藏的input提交一个时间戳和一个随机码来拼密码串，接收页面将拼合的串md5加密取个十位八位的存到数据库里，登陆的时候同样加密后取同样位数到数据库里对比，对比成功之后再到用户浏览器种一个加密的cookie,种cookie的时候需要加入用户浏览器头信息，以防跨浏览器登陆
用PHP做登陆注册页面
登录页：login.php
?php
include("conn.php");
$username=$_POST['name'];
$password=$_POST['password'];
$yanzheng=$_POST['yanzheng'];
if(isset($_POST['submit']))
{
$sql=("select username,password from member where username='$username' and password='$password'") or die("sql语句执行失败");
//print_r($sql);
$ar=mysql_query($sql);
if($ar)
{
if($row=mysql_fetch_array($ar))
{
session_start();
if($_POST["yanzheng"])
{
if($yanzheng!=$_session[pic]||$yanzheng=="")
{
echo "验证码输入有误";
exit;
}
if($yanzheng==$_session[pic])
{
header("location:index.php");
}
}
}
else
{
echo "用户名或密码错误";
}
}
}
?
form action="login.php" method="post"
table border=1 align=center width=500 height=300 bgColor=#DFFFDF bordercolor=#fffbec
tr
td colspan=2 align=center用户登录/td
/tr
tr
td用户姓名：/td
tdinput type="text" name="name" id="name"//td
/tr
tr
td用户密码：/td
tdinput type="password" name="password" id="password"//td
/tr
tr
td验证码：/td
tdinput type="text" name="yanzheng" id="yanzheng"/
img src="yanzheng1.php" width="50" height="30"/img
/td
/tr
tr
td colspan=3 align=center
input type="submit" name="submit" value="登录"/
input type="reset" name="reset" value="重置"/
a href="register.php"注册/a
/td
/tr
/table
/form
注册页：register.php
?php
include("conn.php");
if(isset($_POST['submit'])$_POST['submit']) {
if($_POST['username']=='')
{
echo "用户名不能为空";
exit();
}
if($_POST['password']=='')
{
echo "密码不能为空";
exit();
}
if($_POST['realpass']!=$_POST['password'])
{
echo "两次密码输入不一致";
exit();
}
$sql="insert into member(username,real_name,password,email,headimg) values('$_POST[username]','$_POST[username]','$_POST[password]','$_POST[email]','')";
$ar=mysql_query($sql);
if($ar)
{
header("location:index.php");
}
else
{
echo mysql_error();
}
}
?
body
form action="register.php" method="post"
table border=1 align=center width=500
tr
td height=40 bgColor=#DFFFDF colspan=2会员注册 [a href="login.php"返回登录页/a]/td
/tr
tr
td height=40 bgColor=#fffbec 会员ID/td
tdinput type="text" name="username" id="username"//td
/tr
tr
td height=40 bgColor=#fffbec密码/td
tdinput type="password" name="password" id="password"//td
/tr
tr
td height=40 bgColor=#fffbec确认密码/td
td
input type="password" name="realpass" id="realpass"/
/td
/tr
tr
td height=40 bgColor=#fffbecEMAIL/td
tdinput type="text" name="email" id="email"/
/tr
tr
td height=40 bgColor=#fffbec/td
tdinput type="submit" name="submit" value="注册"/input type="reset" value="重置"/td
/tr
/table
/form
/body
主页显示：index.php
?php
include("conn.php");
function cutstr($str,$cutleng)
{
$str = $str; //要截取的字符串
$cutleng = $cutleng; //要截取的长度
$strleng = strlen($str); //字符串长度
if($cutleng$strleng)return $str;//字符串长度小于规定字数时,返回字符串本身
$notchinanum = 0; //初始不是汉字的字符数
for($i=0;$i$cutleng;$i++)
{
if(ord(substr($str,$i,1))=128)
{
$notchinanum++;
}
}
if(($cutleng%2==1)($notchinanum%2==0)) //如果要截取奇数个字符，所要截取长度范围内的字符必须含奇数个非汉字，否则截取的长度加一
{
$cutleng++;
}
if(($cutleng%2==0)($notchinanum%2==1)) //如果要截取偶数个字符，所要截取长度范围内的字符必须含偶数个非汉字，否则截取的长度加一
{
$cutleng++;
}
return substr($str,0,$cutleng);
}
?
html
head
script type="text/javascript"
function All(e, itemName)
{
var aa = document.getElementsByName(itemName);
for (var i=0; iaa.length; i++)
aa[i].checked = e.checked; //得到那个总控的复选框的选中状态
}
function Item(e, allName)
{
var all = document.getElementsByName(allName)[0];
if(!e.checked) all.checked = false;
else
{
var aa = document.getElementsByName(e.name);
for (var i=0; iaa.length; i++)
if(!aa[i].checked) return;
all.checked = true;
}
}
/script
/head
?php
include("conn.php");
if(isset($_POST['del']))
{
$mm = $_POST["selected"];
$id =implode(",",$mm);
$sql = "delete from forums where id in(".$id.")";
//echo $sql;
$result=mysql_query($sql);
echo $result?"删除成功":"删除失败";
}
?
table style="BORDER-BOTTOM-WIDTH: 1px; BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width=600 align=center border=1 bordercolor=#ddddff
tr align=middle
td height=40 bgColor=#DFFFDF colspan=3论坛列表/td
/tr
tr
td colspan=3a href="login.php" style="float:right"[退出系统]/aa href="add_forum.php" style="float:right"[添加论坛]/a/td
td/td
/tr
tr align=middle
td height=40 bgColor=#DFFFDF width=80状态/td
td height=40 bgColor=#DFFFDF论坛/td
td height=40 bgColor=#DFFFDF最后更新/td
/tr
?php
$sql="select * from forums";
$result=mysql_query($sql);
$num=mysql_num_rows($result);
if($num0)
{
while($row=mysql_fetch_array($result)){
?
tr align=middle
td bgColor=#fffbecinput type="checkbox" name="selected" value="1"//td
td height=50 bgColor=#fffbec width=300
?php
echo "diva href=\"forums.php?F=".$row['ID']."\"".$row['forum_name']."/a/div";
echo cutstr($row['forum_description'],24);//最多显示24个字节，12个字，多余部分用省略号代替
echo "……";
?
/td
td height=50 bgColor=#fffbecdiv?php echo $row['last_post_time']."by".$row['last_post_author']?/div/td
/tr
?php
}
}
else
{
echo "tr bgColor=#fffbectd colspan=3对不起，论坛尚在创建中……/td/tr";
}
?
tr
td colspan=3 input type="checkbox" name="selected" value="1" onclick="All(this,'selected')"/全选/不全选/td
/tr
tr
tdinput type="button" name="del" id="del" value="删除选中项"/
?php
?
/td
/tr
/table
/html
数据库你就自己建，望采纳~
