PHP file never called from jQuery

Question

I have the following script in a HTML file that is called when the document is loaded:

 <script>
      $(document).ready(function(){
                setInterval(function() {
                   $.get('check_session.php', function(data) {
                    alert('Load was performed.');
                });
            }, 5000);
       });
     </script>

The alert message will be called on the interval, but the PHP is not actually called because nothing is echoed.

PHP file: check_session.php

 <?php  
     //check_session.php  
     session_start();  
    echo '<script language="javascript">';
    echo 'alert("successful")';
    echo '</script>';

    echo $_SESSION['user_token'];

     if(isset($_SESSION['user_token']))  
     {  
          echo '0';     //session not expired       
     }  
     else  
     {  
          echo '1';     //session expired  
     }  
     ?>

Essentially, I am trying to call the PHP file, check_session.php, on a five second interval. This is one of my first times implementing jQuery, and after much research, I am still lost.

Any suggestions as to why the php file is not called are appreciated.

---UPDATE:

From Network tab:

What errors do you get in the console? Does the network tab of the developer tools show the PHP file being called? — j08691
– j08691, Commented Sep 18, 2016 at 15:43
I would suggest opening the Developer Tools for your browser, choose the "Network" tab, and having a look at the response for "check_session.php". The result of your echo statements will be there. — wandering-geek
– wandering-geek, Commented Sep 18, 2016 at 15:43
@j08691 No errors in the console, and the network tab shows that PHP file being call. — SamSmith
– SamSmith, Commented Sep 18, 2016 at 15:46
@kkaosninja The network tab shows that PHP file being call. What do you mean "response" for the PHP file? — SamSmith
– SamSmith, Commented Sep 18, 2016 at 15:47
@SamSmith Every HTTP call consists of a request and a response, which you should be able to see in your network tab for each HTTP call. All I am asking you to do is look at the contents of the response that the server sent, for your request to check_session.php — wandering-geek
– wandering-geek, Commented Sep 18, 2016 at 15:52

SandroMarques · Accepted Answer · 2016-09-18 15:50:23Z

3

Check data parameter

 <script>
      $(document).ready(function(){
                setInterval(function() {
                   $.get('check_session.php', function(data) {
                    alert('Load was performed.');
                    console.log('data: '+data)
                });
            }, 5000);
       });
</script>

answered Sep 18, 2016 at 15:50

SandroMarques

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1 Comment

SamSmith Over a year ago

The data parameter shows the echoed variables from the PHP file.

Vijay Dixit · Accepted Answer · 2016-09-18 15:45:13Z

0

the problem might be here: $.get needs URL and other optional params. you are simply giving filename. I think you should add appropriate path also. try it !!

answered Sep 18, 2016 at 15:45

Vijay Dixit

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