我正在尝试显示信息A如果以用户身份登录，如果以管理员身份登录则显示信息B.这里的问题是，我只能执行第一个if statement和else statement，这意味着我可以登录。但是，它永远不会进入else if statement。任何人都可以帮助我，我不知道这里有什么问题。
<?php
$dbhost = "localhost";
$dbuser = "root";
$dbpassword = "";
$dbdatabase = "test";
$db = mysql_connect($dbhost, $dbuser, $dbpassword);
mysql_select_db($dbdatabase, $db);
?>
<?php
if(!isset($_SESSION)){
session_start();
}
include("configuration.php");
?>
<html>
<body>
<?php
if (isset($_SESSION['SESS_EXIST']) == true && isset($_SESSION['SESS_TYPE']) == 'A' ){ ?>
//this is the user html information form
<?php }
else if (isset($_SESSION['SESS_EXIST']) == true && isset($_SESSION['SESS_TYPE1']) == 'B' ){ ?>
//this is the admin html information form
<?php } else { ?>
//ask user/admin to login html form
<form action ="login.php">
<button type="submit" name="login" class="btn-primary">Sign Up</button>
</form>
<?php } ?>
</body>
</html>
<?php
session_start();
require("configuration.php");
if(isset($_SESSION['SESS_EXIST']) == TRUE) {
header("Location: somewhere.php");
die();
}
$email = $_POST['Email'];
$pass = $_POST['Pass'];
$sql = "SELECT * FROM user WHERE Email='$email' and Pass ='$pass' " ;
$res = mysql_query($sql);
$rows = mysql_num_rows($res);
$sql1 = "SELECT * FROM admin WHERE Email='$email' and Pass ='$pass' " ;
$res1 = mysql_query($sql1);
$rows1 = mysql_num_rows($res1);
if($rows == 1)
{
$row = mysql_fetch_assoc($res);
$_SESSION['SESS_EMAIL'] = $row['Email'];
$_SESSION['SESS_NAME'] = $row['Name'];
$_SESSION['SESS_PASS'] = $row['Pass'];
$_SESSION['SESS_TYPE'] = 'A';
$_SESSION['SESS_LOGGED'] = 1;
header("Location: somewhere.php");
die();
}
else if($rows1 == 1)
{
$row1 = mysql_fetch_assoc($res1);
$_SESSION['SESS_EMAIL1'] = $row['Email'];
$_SESSION['SESS_NAME1'] = $row['Name'];
$_SESSION['SESS_PASS1'] = $row['Pass'];
$_SESSION['SESS_TYPE1'] = 'B';
$_SESSION['SESS_LOGGED'] = 1;
header("Location: somewhere.php");
die();
}
else {
echo '<script language = "javascript">';
echo 'alert("Fail login")';
echo '</script>';
echo "<script>window.location.assign('somewhere.php')</script>";
die();
}
?>
答案 0 :(得分：1)
你的情况永远不会成真
if (isset($_SESSION['SESS_TYPE']) && $_SESSION['SESS_TYPE'] == 'A') {
// your code here
}
`isset` — Determine if a `variable` is set and is not `NULL`. `Returns` `TRUE` if var exists and has value other than NULL, FALSE otherwise.
答案 1 :(得分：1)
我认为您在退出时不会重置您的会话。试试这个：
的的login.php
Public Class Form1
Private myCoins As New List(Of Coin)
Private BagWeights As New Dictionary(Of String, Double)
Private CoinWeights As New Dictionary(Of String, Double)
Private CoinsInBag As New Dictionary(Of String, Integer)
Private ActualNumberOfCoinsInBag As Integer
Private Sub ComboBox1_SelectedIndexChanged(sender As Object, e As EventArgs) Handles ComboBox1.SelectedIndexChanged
Dim cb As ComboBox = DirectCast(sender, ComboBox)
Dim TotalWeight As Double
Dim txt As String = cb.Text
If Not String.IsNullOrEmpty(txtTotalWeight.Text) Then
TotalWeight = CDbl(txtTotalWeight.Text)
Else
MessageBox.Show("You Must enter a weight of Coins")
Exit Sub 'no point in continuing if there is no weight
End If
If ValidateWeightAdded(TotalWeight, CoinWeights.Item(cb.Text)) Then
Dim CorrectNumber As Integer = CoinsInBag.Item(cb.Text)
Dim AddRemove As Integer = CorrectNumber - ActualNumberOfCoinsInBag
MessageBox.Show(AddRemove.ToString)
Else
MessageBox.Show("You have added an incorrect weight or some of your coins are fakes")
End If
End Sub
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles Me.Load
SetupCoinsList()
For Each c In myCoins
ComboBox1.Items.Add(c.Name)
CoinWeights.Add(c.Name, c.WeightOfCoinInGrammes)
CoinsInBag.Add(c.Name, c.NumberAllowedInCoinBag)
BagWeights.Add(c.Name, c.WeightOfCoinInGrammes * c.NumberAllowedInCoinBag)
Next
End Sub
Private Sub SetupCoinsList()
Dim onePenny As New Coin With {.Name = "OnePenny", .NumberAllowedInCoinBag = 100, .WeightOfCoinInGrammes = 3.56}
Dim twoPenny As New Coin With {.Name = "TwoPence", .NumberAllowedInCoinBag = 50, .WeightOfCoinInGrammes = 7.12}
Dim fivePenny As New Coin With {.Name = "FivePence", .NumberAllowedInCoinBag = 100, .WeightOfCoinInGrammes = 3.25}
Dim tenPenny As New Coin With {.Name = "TenPence", .NumberAllowedInCoinBag = 50, .WeightOfCoinInGrammes = 6.5}
Dim twentyPenny As New Coin With {.Name = "TwentyPence", .NumberAllowedInCoinBag = 50, .WeightOfCoinInGrammes = 5.0}
Dim fiftyPenny As New Coin With {.Name = "FiftyPence", .NumberAllowedInCoinBag = 20, .WeightOfCoinInGrammes = 8.0}
Dim onePound As New Coin With {.Name = "OnePound", .NumberAllowedInCoinBag = 20, .WeightOfCoinInGrammes = 9.5}
Dim twoPound As New Coin With {.Name = "TwoPound", .NumberAllowedInCoinBag = 10, .WeightOfCoinInGrammes = 12.0}
myCoins.Add(onePenny)
myCoins.Add(twoPenny)
myCoins.Add(fivePenny)
myCoins.Add(tenPenny)
myCoins.Add(twentyPenny)
myCoins.Add(fiftyPenny)
myCoins.Add(onePound)
myCoins.Add(twoPound)
End Sub
Private Function ValidateWeightAdded(ByVal totalCoinWeight As Double, ByVal coinWeight As Double) As Boolean
'Essentially this just determines if the total weight of the coins is exactly divisible by the weight of the selected coin type.
Dim myResult As Double = totalCoinWeight / coinWeight
If myResult = (Fix(myResult)) Then
ActualNumberOfCoinsInBag = CInt(myResult)
End If
Return myResult = (Fix(myResult))
End Function
End Class
Public Class Coin
Property Name As String
Property NumberAllowedInCoinBag As Integer
Property WeightOfCoinInGrammes As Double
Public Sub New()
End Sub
End Class
您的If语句也不正确。如其他答案中所述，它应该是这样的：
somewhere.php 编辑
<?php
session_start();
require("configuration.php");
if(isset($_SESSION['SESS_EXIST']) == TRUE) {
header("Location: somewhere.php");
die();
}
session_unset();
$email = $_POST['Email'];
$pass = $_POST['Pass'];
$sql = "SELECT * FROM user WHERE Email='$email' and Pass ='$pass' " ;
$res = mysql_query($sql);
$rows = mysql_num_rows($res);
$sql1 = "SELECT * FROM admin WHERE Email='$email' and Pass ='$pass' " ;
$res1 = mysql_query($sql1);
$rows1 = mysql_num_rows($res1);
if($rows == 1)
{
$row = mysql_fetch_assoc($res);
$_SESSION['SESS_EMAIL'] = $row['Email'];
$_SESSION['SESS_NAME'] = $row['Name'];
$_SESSION['SESS_PASS'] = $row['Pass'];
$_SESSION['SESS_TYPE'] = 'A';
$_SESSION['SESS_LOGGED'] = 1;
header("Location: somewhere.php");
die();
}
else if($rows1 == 1)
{
$row1 = mysql_fetch_assoc($res1);
$_SESSION['SESS_EMAIL1'] = $row['Email'];
$_SESSION['SESS_NAME1'] = $row['Name'];
$_SESSION['SESS_PASS1'] = $row['Pass'];
$_SESSION['SESS_TYPE1'] = 'B';
$_SESSION['SESS_LOGGED'] = 1;
header("Location: somewhere.php");
die();
}
else {
echo '<script language = "javascript">';
echo 'alert("Fail login")';
echo '</script>';
echo "<script>window.location.assign('somewhere.php')</script>";
die();
}
?>