会话变量不适用于php中的后台进程

Question

Does session variables work when using background process?

I have two php scripts - index.php:

session_start();
$_SESSION['test'] = 'test';

$WshShell = new COM("WScript.Shell");
$oExec = $WshShell->Run("C:/xampp/php/php-cgi.exe -f C:/xampp/htdocs/sand_box/background.php".session_id(), 0, false);
/*
continue the program
*/

and the background.php:

session_id($argv[1]);
session_start();

sleep(5);

$test = $argvs[1];

$myFile = "myFile.txt";
$fh = fopen($myFile, 'w') or die("can't open file");
fwrite($fh, $test);
fclose($fh);

The background process creates the myFile.txt however the session variable doesn't work. I did some other tests and it doesn't work in any case. Anyone knows why?

Is it a limitation of using a background process?

I edited the code, my problem now is that I can't pass any variable as arguments. $argv is always empty.

I finally solved it, register_argc_argv must be enabled on php.ini!

Answer 1

You can pass session_id to the background script:

$oExec = $WshShell->Run("C:/xampp/php/php-cgi.exe -f C:/xampp/htdocs/sand_box/background.php " . session_id(), 0, false);

In your background script, you write as the first line:

session_id($argv[1]);
session_start();

Edit: As mentioned by @chris, due to locking you need to be aware that the background script will be waiting for the index.php to stop executing.