connect.send（窗体），不发送

Question

sorry about my english. I have a problem with AJAX about one week, and can't solve it. I have Searched everywere. This is part of code of login.js function. I don't know why it don't work

..

connect.open("POST","ajax.php?mode=login",true);
connect.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
window.alert(form); //here I see the window,with the data form ok
connect.send(form);

...

The path of ajax.php it's right, I put a message at the begining of ajax.php to check, but never execute.

ajax.php code...

<?php
if($_POST)
{
switch (isset($_GET['mode']) ? $_GET['mode'] : null)  
 {        
case 'login':             
echo "login case";        
  break;       

default:           
  header('location: index.php');
 break;        
}
} 
else
{    
  header('location: index.php');  
 }
?>

Thanks in advance...

Answer 1

Change the first line of your PHP file to if (!empty($_POST)) {

$_POST is never parsed to true, so your request always stops there. By using !empty you make sure there's a $_POST array, and that it's not empty.