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php basic ajax example, not returning 0 value from php file

PHP_CHILD

By PHP_CHILD
in Javascript Help

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PHP_CHILD Member

PHP_CHILD

Posted
Posted

i have a very basic ajax script. It works for if login is successful, but the not when the login is not ok.

 

<script type="text/javascript">


       // Wait for the page to load first
       window.onload = function() {


          function createObject() {
 var request_type;
 var browser = navigator.appName;
   if(browser == "Microsoft Internet Explorer"){
   request_type = new ActiveXObject("Microsoft.XMLHTTP");
   }else{
   request_type = new XMLHttpRequest();
   }
 return request_type;
 }


var http = createObject();


         var a = document.getElementById("login");


         //Set code to run when the link is clicked
         // by assigning a function to "onclick"
         a.onclick = function() {





document.getElementById('login_response').innerHTML = "Loading..."


var username = encodeURI(document.getElementById('username').value);
var password = encodeURI(document.getElementById('password').value);


nocache = Math.random();


http.open('get', 'http://appsmarketing.net/hr/login.php?username='+username+'&password='+password+'&nocache = '+nocache);
http.onreadystatechange = loginReply;
http.send(null);
 }
function loginReply() {
if(http.readyState == 4){ 
var response = http.responseText;
if(response == 0){
document.getElementById('login_response').innerHTML = 'Login failed! Verify user and password';
// else if login is ok show a message: "Welcome + the user name".
} else {
document.getElementById('login_response').innerHTML = 'Welcome'+response;

}
  }
           return false;
         }
       }
   </script>
</head>


<body>
  <form method="get">
  <tbody>
  <tr>
                       <td >Username: </td>
                       <td ><input type="text" name="username" value="" id="username" class="txt_bg"></td>
                    </tr>
  <tr>
                       <td>Password: </td>
                       <td ><input type="password" name="password" id="password" value="" class="txt_bg"></td>
                    </tr>
  <tr>
                    <input id="login" type="submit" value="Login" class="login_btn"></a></div>
  </tr>
  </tbody>
  </table>
  </form>

and the php file is

 

 

<?php





if(isset($_GET['username']) && isset($_GET['password'])){


$uname = $_GET['username'];
$psw = $_GET['password'];


$aa="SELECT 'mid' FROM `check` WHERE uname='".$uname."' AND password123='".$psw."'  AND mid='1'";


$query=mysql_query($aa) or die(mysql_error());


$num_results=mysql_num_rows($query) or die(mysql_error());


if(($query)&&($num_results==1))



{echo "ok done";} 
else 
{echo "0";}




}


?>

i want to make response==0, but the control transfers to the else part of javascript function?? how do i return the false value to get login failed message.. Thanks in advances...

PHP_CHILD Member

PHP_CHILD

Posted
  • Author
Posted

When you execute the php directly in your browser instead of via AJAX, what do you get?

sorry for d late reply..i get nothin actually from login.php... no output.. d success case works fine. am havin trouble with not-success part.. i get Welcome ok done for success. and for not-sucess i get just Welcome...

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