使用AJAX登出无法正常工作

Question

i want to logout on clicking this button

html input

<input type="button" value="logout" id="top-btn-logout" onclick="test()"> 

my js file

function test()
{
    $("#top-btn-logout").click(function() {
        $.ajax({
            url: 'http://localhost/New%20folder/vigcheck.php?action=logout',
            success: function(data){
            alert(data);
                   //location.reload();
                //window.location.href = data;
            }
        });
    });


}  



check.php file.   

<?php
if(isset($_GET['action']) == "logout" ){

    //$_SESSION = array();
    session_destroy();
    session_unset();  
    echo "logout";exit;
}?>

Answer 1

First use a proper get request using jquery ajax try

$.ajax({
            url: 'http://localhost/New%20folder/vigcheck.php',
            type: 'get',
            data:{action:'logout'},
            success: function(data){
            alert(data);
                   //location.reload();
                //window.location.href = data;
            }
        });

then check.php file. (you are combining conditions to check use both conditions separate)

<?php
if(isset($_GET['action'])  && $_GET['action'] == "logout" ){

    //$_SESSION = array();
    session_destroy();
    session_unset();  
    echo "logout";exit;
}?>

Answer 2

  if(isset($_GET['action']) == "logout" ){

This is incorrect because isset will return true and true != 'logout' so make it as

 if(isset($_GET['action'])){
   if($_GET['action']=="logout";
     //do whatever you wanna do
 }

Answer 3

You need to check for returned data from check.php file on success of ajax request . After that redirect the user to your login page.

Answer 4

Try this it will work :

JS File :

function test()
{
    $("#top-btn-logout").click(function() {
        $.ajax({
            url: 'http://localhost/New%20folder/vigcheck.php?action=logout',
            success: function(data){
            alert(data);
                   //location.reload();
                //window.location.href = data;
            },
          error: function(XMLHttpRequest, textStatus, errorThrown) {
    if (XMLHttpRequest.status === 401) {
          location.href = 'index.php';
        }
      }
        });
    });
}

check.php :

<?php
if(isset($_GET['action']) == "logout" ){

header("HTTP/1.1 401 Unauthorized");

}
?>