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Editorial Team
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Asked: 2026-05-13T12:49:48+00:00

I have a very simple jQuery/ajax script for a membership driven website. The script

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I have a very simple jQuery/ajax script for a membership driven website. The script just checks to see if the user entered info, validates it against my database and returns 1 for a failed login attempt, and 0 if the username/password match.

The function works perfectly when I run it w/o calling it from ajax.

Firefox: everything works.
Chrome/Safari: The query is locking everything up. When I enter valid info, there isn’t even any record of a request going out (in the developer tools chrome/safari supply). When invalid info is entered the request is going out and it returns 3.

I’m pretty baffled by this.

Is it a “sandbox” issue? as I understand it Firefox and Chrome/safari handle XHR differently… Although don’t ask me how.

I am running a base install of MAMP. Could this be something on my developer environment? (I will be testing it on a live server later this afternoon)

Here is my AJAX call and the php script it is calling.

AJAX:

$.ajax({
  //I've also tried..
  //url: '_modules/php/session.php',
 url: 'http://localhost/current/100TradeJack/httpdocs/_modules/php/session.php',
 type: 'POST',
 cache: false,
 timeout: 5000,
 data: "method=login&"+$('#loginTop').serialize(),
 error: function(XMLHttpRequest, ajaxOptions, thrownError)
 {
  alert("ERORR!!");
 },
 success: function(response){
  alert(response);
  if(response == '0'){ 
   alert("log user in");
   window.location.replace("http://localhost/current/100TradeJack/httpdocs/trading.php");
  } else if(response == '1') {
   alert("invalid username/password");
  } else {
   alert("ERRROOR!");
  }

 }
});

session.php:

if($_POST['method'] == 'login'){
    $validated = login($_POST['email'], $_POST['password']);
    echo $validated;
}


function login($email, $password){
$connection = mysql_connect("localhost","root","root") or die(mysql_error());
mysql_select_db("sandbox_members", $connection) or die(mysql_error());


if($email){
 $email = mysql_real_escape_string($email);
} else {
 return 1;
}

if($password){
 $password = mysql_real_escape_string($password);
} else {
 return 1;
}


$query = "SELECT * FROM users WHERE username='". $email . "' AND password='". $password ."'";

$result = mysql_query($query);

if($row = mysql_fetch_array($result)){
 return 0; 
} else {
 return 3;
}

//if it gets to here the username/password combo was incorrect or was not found in the db
return 1;
mysql_close($connection);
}
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1 Answer

  1. Editorial Team

    There is a small issue in your PHP code:

    After your query db, you return some numbers representing state, however on the end of the script you close the connection to your database… mysql_close($conn) will never occur as you jump out of the function scope with those various returns before the closing statement. Maybe those hiccups you experience are because of unclosed DB connections.

    JS code looks fine

    I modified the ajax call to grab a static html, which I edited to various scenarios (using 0, 1, …) and it worked perfectly (Opera, Chrome, FF)..

    Also try window.alert($('#loginTop').serialize()) to check posted data, or create a plain html document with a form and JS (without all other logic) and point it to your script.

    Also check your scripts for console.log() as this may destroy your javascript in other browsers than FF

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