引导PHP登录

Question

我的PHP登录问题.我正在使用bootstrap,当我点击"登录"时,什么也没发生.如果我是对的,应该将我提交给空白页面.

有什么建议？

引导代码:

<div class="container">
    <div class="row">
    <div class="col-md-4 col-md-offset-4">
        <div class="panel panel-default">
          <div class="panel-heading">
            <h3 class="panel-title">Please sign in</h3>
        </div>
          <div class="panel-body">
            <form accept-charset="UTF-8" role="form">
              <form action="submit.php" method="post">
                <fieldset>
                <div class="form-group">
                  <input class="form-control" placeholder="Username" name="Username" type="text">
              </div>
              <div class="form-group">
                <input class="form-control" placeholder="Password" name="password" type="password" value="">
              </div>
              <input class="btn btn-lg btn-primary btn-block" type="submit" value="Login">
            </fieldset>
              </form>
          </div>
      </div>
    </div>
  </div>
</div>

PHP代码:

<?php

$username = $_POST['username'];
$password = $_POST['password'];



if($username&&$password)
{

  $connect = mysql_connect("localhost", "sfmin", "password") or die("Error"); 
  mysql_select_db("rothienc_login") or die("error");

  $query = mysql_query("SELECT * FROM users WHERE username='$username'");

  $numrows = mysql_num_rows($query);


  if($numrows!=0)
  {


  }
  else 
    die("That user doesn't exist!");

}
else
 die("ERROR");


?>

Answer 1

你定义了<form>两次:

<form accept-charset="UTF-8" role="form">
    <form action="submit.php" method="post">

将其更改为仅一个元素:

<form action="submit.php" method="post" accept-charset="UTF-8" role="form">

将您的用户<input>名称属性设为小写:

<input class="form-control" placeholder="Username" name="username" type="text">

正确转义SQL查询:

$query = mysql_query(
    "SELECT * FROM users WHERE username='" . mysql_real_escape_string($username) . "'"
);