求一个php登录的代码

[q274256181]

MYSQL数据库
数据库名称：nd
表名：user
字段：name/password
求高人给个登录代码 请写的详细些 我是新手 怕看不懂 谢谢

[床上等您]

结帖率 0.00%

[q274256181]

。。。。刚注册没多久
一共发布了3个问题 目前还都没解决

[thinkinginAOCP]

把标识登录的用户信息存放在cookie中或者是session中就行了,
$_COOKIE['name'] $_COOKIE['id']等.
有无登录的用户信息->是否登录.

[sciolist]

这种东西谷歌搜索一下就有，lz怎么不自己动手呢？

1.数据库

--Name the table "dbUsers." It will need 4 fields:
Name             Type                    Addition
id                  int(10)              Primary Key, AUTO_INCREMENT
username            varchar(16)          Unique
password            char(16)          
email               varchar(25)

数据库基类:
dbConfig.php

<?
// Replace the variable values below
// with your specific database information.
$host = "localhost";
$user = "UserName";
$pass = "Password";
$db   = "dbName";

// This part sets up the connection to the
// database (so you don't need to reopen the connection
// again on the same page).
$ms = mysql_pconnect($host, $user, $pass);
if ( !$ms )
{
echo "Error connecting to database.\n";
}

// Then you need to make sure the database you want
// is selected.
mysql_select_db($db);
?>

2.注册功能
register.php

<?php

// dbConfig.php is a file that contains your
// database connection information. This
// tutorial assumes a connection is made from
// this existing file.
include ("dbConfig.php");


//Input vaildation and the dbase code
if ( $_GET["op"] == "reg" )
 {
 $bInputFlag = false;
 foreach ( $_POST as $field )
  {
  if ($field == "")
   {
   $bInputFlag = false;
   }
  else
   {
   $bInputFlag = true;
   }
  }
 // If we had problems with the input, exit with error
 if ($bInputFlag == false)
  {
  die( "Problem with your registration info. "
   ."Please go back and try again.");
  }

 // Fields are clear, add user to database
 //  Setup query
 $q = "INSERT INTO `dbUsers` (`username`,`password`,`email`) "
  ."VALUES ('".$_POST["username"]."', "
  ."PASSWORD('".$_POST["password"]."'), "
  ."'".$_POST["email"]."')";
 //  Run query
 $r = mysql_query($q);
 
 // Make sure query inserted user successfully
 if ( !mysql_insert_id() )
  {
  die("Error: User not added to database.");
  }
 else
  {
  // Redirect to thank you page.
  Header("Location: register.php?op=thanks");
  }
 } // end if


//The thank you page
elseif ( $_GET["op"] == "thanks" )
 {
 echo "<h2>Thanks for registering!</h2>";
 }
 
//The web form for input ability
else
 {
 echo "<form action=\"?op=reg\" method=\"POST\">\n";
 echo "Username: <input name=\"username\" MAXLENGTH=\"16\"><br />\n";
 echo "Password: <input type=\"password\" name=\"password\" MAXLENGTH=\"16\"><br />\n";
 echo "Email Address: <input name=\"email\" MAXLENGTH=\"25\"><br />\n";
 echo "<input type=\"submit\">\n";
 echo "</form>\n";
 }
// EOF
?>

3.登录功能
login.php

<?php
session_start();
// dBase file
include "dbConfig.php";

if ($_GET["op"] == "login")
 {
 if (!$_POST["username"] || !$_POST["password"])
  {
  die("You need to provide a username and password.");
  }
 
 // Create query
 $q = "SELECT * FROM `dbUsers` "
  ."WHERE `username`='".$_POST["username"]."' "
  ."AND `password`=PASSWORD('".$_POST["password"]."') "
  ."LIMIT 1";
 // Run query
 $r = mysql_query($q);

 if ( $obj = @mysql_fetch_object($r) )
  {
  // Login good, create session variables
  $_SESSION["valid_id"] = $obj->id;
  $_SESSION["valid_user"] = $_POST["username"];
  $_SESSION["valid_time"] = time();

  // Redirect to member page
  Header("Location: members.php");
  }
 else
  {
  // Login not successful
  die("Sorry, could not log you in. Wrong login information.");
  }
 }
else
 {
//If all went right the Web form appears and users can log in
 echo "<form action=\"?op=login\" method=\"POST\">";
 echo "Username: <input name=\"username\" size=\"15\"><br />";
 echo "Password: <input type=\"password\" name=\"password\" size=\"8\"><br />";
 echo "<input type=\"submit\" value=\"Login\">";
 echo "</form>";
 }
?>

好了，完了。

lz 结贴吧

[HOOLOO]

还没结贴啊

[地雷]

不会结的吧。。。

[骄傲青蛙]

no words ...

[ragnaros87]

四楼太犀利了，拷走学习学习！

[zhouzerong2006]

这个lz真是个首例

[jonas]

php技术联盟 ，新手学习必备参考网站www.diysys.com，

[joaryyu]

4楼的同志都写了，弟兄就不在那个啥 了。。。。。。

[xiongyafen]

顶顶顶顶顶顶顶

[yahuD]

4楼真认真，赞一个，结贴前留名