无法登入 [英] Unable to login

问题描述

dbConfig.php

<?php
$dbhost = 'localhost';
$dbuser = 'root';
$dbpass = '';

$conn = mysql_connect($dbhost, $dbuser, $dbpass) or die;

$dbname = 'charitydatabase';
mysql_select_db($dbname);
echo("Successfully Connected to ". $dbname . " !");
mysql_query($sql);

?>

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
  $q = "INSERT INTO `dbuser` (`username`,`password`,`email`) "
        ."VALUES ('".$_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
        ?>

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
  $q = "SELECT * FROM `dbuser` "
        ."WHERE `username`='".$_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: member.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>";
  }
        ?>

问题1: 能够将用户添加到数据库.但是我在调​​试代码后收到错误消息:

Problem 1: Able to add user to database. But i get an error msg after debug the code:

警告:无法修改标头信息-已在第49行的C:\ xampp \ htdocs \ Login \ register.php中发送的标头已发送(输出从C:\ xampp \ htdocs \ Login \ dbConfig.php:4开始)

Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\Login\dbConfig.php:4) in C:\xampp\htdocs\Login\register.php on line 49

问题2: 并在数据库中保存密码字段时出错.

Problem 2: and error saving the password field in database.

问题3:

无法登录.

请帮助我解决上述问题，tq！

Please help me solve the above question, tq!

推荐答案

从dbConfig.php中删除回显，不能在回显之后使用header()函数. (我们用来在register.php中重定向的标头)

Remove the echo from the dbConfig.php, you cannot use the header() function after an echo. (the header us used to redirect in register.php)

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