session doesn't work in background process PHP file with symfony 2.0

Question

I am sending email in background process. For background process I am using symfony 2.0. Background works successfully. but in background I can't get session value.. Below code of index.php

session_start();
$_SESSION['album_upload'] = {"a","b"};
$command = file_get_contents('background.php');
$process = new PhpProcess($command);
$process->run();

below code of background.php

session_start();
$message = $_SESSION['album_upload'][0];
mail("[email protected]","example",$message,"From: $from\n"); // Session doesn't give any value.

If I remove session and just try to send mail like mail("[email protected]","example","example","From: $from\n"); then mail will send.

How to get the session value in background.php.

Session data is retrived based on the sessio id cookie the browser sends with the request. A background task isnt initiated by a browser, so no cookie, so no session data — Steve
– Steve, Commented Sep 11, 2014 at 10:45

Isaac · Accepted Answer · 2014-09-13 12:59:27Z

2

Try to retrieve the session id from you're first script and pass it to the next one. You can do it with the session_id() func

Code Index.php

$session_id = session_id();
new PhpProcess($command, null, array('session_id' => $session_id));
$process->start();
while ($process->isRunning()) {// waiting for process to finish }

Code background.php

session_id($_SERVER['session_id']);
session_start();
$message = $_SESSION['album_upload'][0];
mail("[email protected]","example",$message,"From: $from\n"); // Session doesn't give any value.

edited Sep 13, 2014 at 12:59

answered Sep 11, 2014 at 10:49

Isaac

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3 Comments

Akash Over a year ago

@issac I never used session_id() before. But how to set in index.php and get it in background.php so I can get my ` $_SESSION['album_upload']` data

Akash Over a year ago

@ Issac Your code working now. I don't know but $process->run(); waits for the execution and after run it will execute rest of code.?? I want to execute in background. It should not be wait for execution. It is possible???

Isaac Over a year ago

@user3730347 put $process-start() to execute in background, then add this at the end of you're code while ($process->isRunning()) { // waiting for process to finish } to be sure that your email got the necessary time to be sent.

Simon Brahan · Accepted Answer · 2014-09-11 10:56:04Z

2

PhpProcess runs as a seperate php process; this means it does not have access to the $_SESSION information that was available to the original request to your server.

You can pass the data as follows:

new PhpProcess($command, null, array('album_upload' => $_SESSION['album_upload'][0]));

That should allow you to acccess the data in your background script as the variable:

$_SERVER['album_upload']

answered Sep 11, 2014 at 10:56

Simon Brahan

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7 Comments

Akash Over a year ago

when I an using print_r($_SERVER['album_upload']) at background it gives me 1 output. I need to set two-dimensional array

Simon Brahan Over a year ago

I'd guess you need to double check the structure of your $_SESSION['album_upload'] variable.

Akash Over a year ago

Is PhpProcess() doing background process??. means we don't need to do like ini_set('max_execution_time', 500) for execution time???

Akash Over a year ago

I don't know but $process->run(); waits for the execution and after run it will execute rest of code.?? I want to execute in background. It should not be wait for execution. It is possible???

Simon Brahan Over a year ago

$process->start() will run the code in the background without blocking. However, Symfony automatically stops child process when its main thread completes, so your email may not be sent.

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