这是我一直在研究的登录系统。似乎无论我做什么，即使登录有效，它也会直接将我发送到错误页面。
- 我正在从表单中获取用户名/密码字符串。
- 查询是正确的，我测试了它，然后我绑定了这些变量。
- 然后它把我送到错误页面。如何检查我是否正确检索行？
<?php
function clean($str)
{
$str = @trim($str);
if(get_magic_quotes_gpc()) {
$str = stripslashes($str);
}
return mysql_real_escape_string($str);
}
//Sanitize the POST values
$username = clean($_POST['username']);
$password = clean($_POST['password']);
/* Create a new mysqli object with database connection parameters */
$mysqli = mysqli_connect('localhost', 'root', '', 'draftdb');
if(mysqli_connect_errno())
{
echo "Connection Failed: " . mysqli_connect_errno();
exit();
}
/* Is your username the same as the login_id? If not you need to change this query's where to use the username column not the login_id. */
/* Create a prepared statement */
if($stmt = $mysqli -> prepare("
SELECT Login_ID, Login_PW
FROM login
WHERE Login_ID=? AND Login_PW=?
"))
{
/* Bind parameters
s - string, b - boolean, i - int, etc */
$stmt -> bind_param("ss", $username, md5($password));
/* Execute it */
$result = $stmt -> execute();
//Check whether the query was successful or not
if ($result === false)
{
die("Query failed");
}
/* Bind results to variables that will be used within the fetch() loop. */
$stmt -> bind_result($username, $password);
/* Check the number of rows returned. */
if ($stmt->num_rows !== 1) {
//Login failed
header("location: login-failed.php");
exit();
}
/* Iterate over the results of the query. */
while ($stmt->fetch())
{
//Login Successful
if($stmt->num_rows > 0)
{
session_regenerate_id();
/* We can use $login_id, $firstname and $lastname cause we binded the result to those variables above. */
$_SESSION['SESS_MEMBER_ID'] = $username;
session_write_close();
header("location: member-index.php");
exit();
}
}//main if close
/* Close statement */
$stmt -> close();
}
/* Close connection */
$mysqli -> close();
?>
更新得出结论，我没有从我的表单中得到任何传递给我的 php 脚本的东西
<table width="300" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<form name="form1" method="POST" action="login.php">
<td>
<table width="100%" border="0" cellpadding="3" cellspacing="1" bgcolor="#FFFFFF">
<tr>
<td colspan="3"><strong>Member Login </strong></td>
</tr>
<tr>
<td width="78">Username</td>
<td width="6">:</td>
<td width="294"><input name="username" type="text" id="username"></td>
</tr>
<tr>
<td>Password</td>
<td>:</td>
<td><input name="password" type="text" id="password"></td>
</tr>
<tr>
<td> </td>
<td> </td>
<td><input type="submit" name="Submit" value="Login"></td>
</tr>
</table>
</td>
</form>
</tr>
</table>