重定向功能不起作用

Question

我正在尝试从登录页面获取密码，然后尝试从 mysql 收集存储的密码。然后我将它与提交的密码进行比较。现在我想如果两个密码匹配然后重定向到一个页面。但问题是每次页面重定向。如果密码甚至与页面重定向不匹配。

<?php
if (redirect()==true){
    header('location:http://google.com');
}
if(redirect()!=false){
    echo "password doesnt match";
}
$hostname="localhost";
$dbname="justlive_main";
$dbusername="justlive_main";
$dbpass="Kalkata1";
#Veriable collected From Login Panel
$Submitted_Email_Address=$_POST['email'];
$Submitted_Password=$_POST['password'];
$encrypt_Submitted_Password=md5($Submitted_Password);

#Lets gather Data From MySql Database
$con=new mysqli($hostname,$dbusername,$dbpass,$dbname);
if (mysqli_connect_errno($con)) {
    die('The connection to the database could not be established.');
}
$query="SELECT * FROM users WHERE Email_Address='$Submitted_Email_Address'";
$result=$con->query($query);
$row=$result->fetch_array();
$SQL_Password = $row['Password'];
function redirect(){
    if ($encrypt_Submitted_Password!=$SQL_Password) {
        return false;
    }
    elseif ($encrypt_Submitted_Password == $SQL_Password) {
        return true;
    }
}
#Lets CLose All The MySql Connection
$result->free();
$con->close();
?>

我已删除该功能并尝试以简单的方式进行操作。但它仍然无法正常工作。 编辑代码：

    <?php 

if ($encrypt_Submitted_Password!=$SQL_Password) {
       echo "Please check your Password";
}
elseif ($encrypt_Submitted_Password == $SQL_Password) {
        header('location:http://google.com');
}
$hostname="localhost";
$dbname="justlive_main";
$dbusername="justlive_main";
$dbpass="Kalkata1";
#Veriable collected From Login Panel
$Submitted_Email_Address=$_POST['email'];
echo "Submited Email Address:". $Submitted_Email_Address."<br>";
$Submitted_Password=$_POST['password'];
echo "Submitted Password : ".$Submitted_Password. "<br>";
$encrypt_Submitted_Password=md5($Submitted_Password);
echo "Encrypted Submitted_Password:".$encrypt_Submitted_Password."<br>";

#Lets gather Data From MySql Database
$con=new mysqli($hostname,$dbusername,$dbpass,$dbname);
if (mysqli_connect_errno($con)) {
    die('The connection to the database could not be established.');
}
$query="SELECT * FROM users WHERE Email_Address='$Submitted_Email_Address'";
$result=$con->query($query);
$row=$result->fetch_array();
$SQL_Password = $row['Password'];
echo "Mysql Database Stored Password: ".$SQL_Password."<br>";


#Lets CLose All The MySql Connection
$result->free();
$con->close();

?>

Answer 1

您在设置 $encrypt_Submitted_Password 和 SQL_Password 之前调用了 redirect() 函数。初始化后移动“ifs”。而且您必须将它们声明为全球性的。或者更好的是，将变量作为参数传递

Answer 2

我已经检查了您的代码，并在加载了所有变量后带来了 header 命令。它现在在我的最后工作。我认为您在准备好之前调用了 $SQL_Password 变量。请看一下，让我知道它是否有效。

<?php 
$hostname="localhost";
$dbname="justlive_main";
$dbusername="justlive_main";
$dbpass="Kalkata1";
#Veriable collected From Login Panel
$Submitted_Email_Address=$_POST['email'];
#echo "Submited Email Address:". $Submitted_Email_Address."<br>";
$Submitted_Password=$_POST['password'];
#echo "Submitted Password : ".$Submitted_Password. "<br>";
$encrypt_Submitted_Password=md5($Submitted_Password);
#echo "Encrypted Submitted_Password:".$encrypt_Submitted_Password."<br>";

#Lets gather Data From MySql Database
$con=new mysqli($hostname,$dbusername,$dbpass,$dbname);
if (mysqli_connect_errno($con)) {
    die('The connection to the database could not be established.');
}
$query="SELECT * FROM users WHERE Email_Address='$Submitted_Email_Address'";
$result=$con->query($query);
$row=$result->fetch_array();
$SQL_Password = $row['Password'];
#echo "Mysql Database Stored Password: ".$SQL_Password."<br>";
if ($encrypt_Submitted_Password!=$SQL_Password) {
       echo "Please check your Password";
}
elseif ($encrypt_Submitted_Password == $SQL_Password) {
        header('location:dashboard.php');
}   
#Lets CLose All The MySql Connection
$result->free();
$con->close();

?>

Answer 3

您的重定向函数不正确：$encrypt_Submitted_Password 和 $SQL_Password 不在函数范围内，因此它会返回 Notice 错误，但您可以使用 global：

function redirect(){

    global $encrypt_Submitted_Password, $SQL_Password

    if ($encrypt_Submitted_Password!=$SQL_Password) {
        return false;
    }else{
        return true;
    }
}

或者您可以将两个变量作为参数传递给函数。

正如@Guilleva 所说，您在实例化之前调用它：

你的代码应该是这样的：

<?php

function redirect(){
    if ($encrypt_Submitted_Password!=$SQL_Password) {
        return false;
    }else{
        return true;
    }
}


$hostname="localhost";
$dbname="justlive_main";
$dbusername="justlive_main";
$dbpass="Kalkata1";
#Veriable collected From Login Panel
$Submitted_Email_Address=$_POST['email'];
$Submitted_Password=$_POST['password'];
$encrypt_Submitted_Password=md5($Submitted_Password);

#Lets gather Data From MySql Database
$con=new mysqli($hostname,$dbusername,$dbpass,$dbname);
if (mysqli_connect_errno($con)) {
    die('The connection to the database could not be established.');
}
$query="SELECT * FROM users WHERE Email_Address='$Submitted_Email_Address'";
$result=$con->query($query);
$row=$result->fetch_array();
$SQL_Password = $row['Password'];

if (redirect()==true){
    header('location:http://google.com');
}else{
    echo "password doesnt match";
}

#Lets CLose All The MySql Connection
$result->free();
$con->close();
?>

Answer 4

你的代码是

if (redirect()==true){
header('location:http://google.com');
}
if(redirect()!=false){
echo "password doesnt match";
}

这里redirect()==true和redirect()!=false的意思是一样的

所以你的代码应该是

if (redirect() == true){
header('location:http://google.com');
}
if (redirect() == false){
echo "password doesnt match";
}