Session does not get updated value in php

Question

I am calling firstpage.php it changing $_SESSION['Progress'] session value. But when I call progress.php for get $_SESSION['Progress'] session value it keep gives "1" value. progress.php doesn't gives updated value. I checked manually firstpage.php working fine. but I don't know why progress.php doesn't give updated value.

var progressInterval;
  $.ajax({
          type: "POST",
          url: "firstpage.php",
          cache: false,
          data: {
            first: first
          },
          success:function(result)
          {
            if(progressInterval) {
                clearInterval(progressInterval); //if I remove this session still show "1" output
            }
            alert(result); // print session value. ex:- value- 1,2,3,4,5,6,7,8,Final=8
          }
  });

  progressInterval = setInterval(function(){
      $.ajax({
          url:'progress.php',
          type: 'get',
          data: {"name":"Progress"},
          dataType:'json',
          success: function(data) {
              $('.output').text((parseInt(data.progress))+"%"); // KEEP SHOWING 1% (why value does not change?????)
          },
          error:function(err){
              console.log(err);
          }
      });

  }, 1000);

firstpage.php

session_start();
$_SESSION['Progress'] = 0;
  $data=0;
  $progress=$_SESSION['Progress'];
  foreach($album_data as $row) //assume foreach works fine.
    {
        $progress++;
        $_SESSION['Progress'] = $progress;
        $data.=$progress.",";
        session_write_close();
    }
  }
  echo $data." final=".$_SESSION['Progress']; //output-1,2,3,4,5,6,7,8 final=8

progress.php code

session_start();

getProgress($_GET['name']);

function getProgress($filename) {
    if (isset($_SESSION[$filename])) {
        echo json_encode(array("progress" => $_SESSION[$filename]));
    } else {
        echo json_encode(array("progress" => 0));
    }
}

show us how did you set the session in firstpage.php

meda
– meda

2014-09-06 04:46:20 +00:00
Commented Sep 6, 2014 at 4:46 — meda
– meda, Commented Sep 6, 2014 at 4:46

meda · Accepted Answer · 2014-09-06 06:20:24Z

2

session_write_close(); ends the current session and store session data.

At each iteration of the loop you will need to restart the session using session_start();

edited Sep 6, 2014 at 6:20

answered Sep 6, 2014 at 4:57

meda

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17 Comments

Akash Over a year ago

Sorry I already added session_start() in the starting line but I forgot to mansion in code. in firstpage.php session works fine. it also gives the output. but I didn't get from progress.php page

meda Over a year ago

but what are you doing with $filename I didnt get that part?

Akash Over a year ago

nothing but I am just trying to get the value of $_SESSION['Progress']. And i thing It should be give.

Akash Over a year ago

If I reomove clearInterval(progressInterval); I still give me output 1

meda Over a year ago

@user3730347 remove that line session_write_close();

|

Akash · Accepted Answer · 2014-09-06 07:05:41Z

2

I changed in firstpage.php. and it works now.

session_start();
$_SESSION['Progress'] = 0;
 $data=0;
  $progress=$_SESSION['Progress'];
  foreach($album_data as $row) //assume foreach works fine.
   {
    session_start(); //we need to start session because we closed the session using session_write_close(); 
    $progress++;
    $_SESSION['Progress'] = $progress;
    $data.=$progress.",";
    session_write_close(); // need to close because we getting the value uses at progress.php. 
   }
 }
 session_start();
 echo $data." final=".$_SESSION['Progress']; //output-1,2,3,4,5,6,7,8 final=8

edited Sep 6, 2014 at 7:05

answered Sep 6, 2014 at 6:04

Akash

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1 Comment

Akash Over a year ago

No we need to start every time

Dody · Accepted Answer · 2014-09-06 05:51:19Z

0

You migh try this. you have index.php which fetch value of $_SESSION['Progress'] here is what index.php contain

index.php

<html>
<head>
    <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
    <script>
        var progressInterval;

        progressInterval = setInterval( function(){
        $.ajax({
              url: "progress.php",
              data: { name: 1 }
            }).done(function(msg) {
               $("#test1").text(msg);
            });
        }, 2000);
    </script>
</head>
<body>
    <p id='test1' class='output'></p>
</body>
</html>

it will fetch all $_SESSION['Progress'] every 2 seconds.

And here what progress.php contain

session_start();
getProgress($_GET['name']);
function getProgress($filename) {
    if (isset($_SESSION['Progress'])) {
        echo json_encode(array("progress" => $_SESSION['Progress']));
    } else {
        echo json_encode(array("progress" => 0));
    }
}

and then for firstpage.php

session_start();
  $_SESSION['Progress'] = 0;
  /*
  $data=0;
  $progress=$_SESSION['Progress'];
  foreach($album_data as $row) //assume foreach works fine.
    {
        $progress++;
        $_SESSION['Progress'] = $progress;
        $data.=$progress.",";
        session_write_close();
    }
  }
  echo $data." final=".$_SESSION['Progress']; //output-1,2,3,4,5,6,7,8 final=8
  */

firstpage.php work just for change $_SESSION['Progress'] value.

Try to open 2 windows of browser. one for index.php and one for firstpage.php.

Keep index.php open, while you change the value of $_SESSION['Progress'] in firstpage.php to 2(for example) and reload page firstpage.php. then, you will found out the value of $_SESSION['Progress']which return by ajax request in index.php change to {"progress":2}

So your problem I think on performing ajax request.

answered Sep 6, 2014 at 5:51

Dody

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2 Comments

Akash Over a year ago

I think the problem is session lockingin firstpage.php page. I try to inspect element. and the status of progress.php is "pending" when the firstpage.php process done then process.php return the output

Dody Over a year ago

I Guest so. I think you should extend your get session request interval and make sure set session request called first using window.onload or document.onload to call get session ajax request.

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