I have written a simple code for $_SESSION variable in the first php file:
<?php
session_start();
$_SESSION["name"] = "John";
?>
and in another php file to render this:
<?php
session_start();
echo $_SESSION["name"];
?>
But after that i used session_unset(); and session_destroy(); and after that i can't render any new $_SESSION variable nor the existing one. I am using Microsoft WebMatrix program and Chrome as main browser. Any suggestions? Thank you in advance.
That is because session_destroy(); destroys the current session and also sends a header to the browser to delete the session variable. In the same time the session is deleted on the server (in PHP) and the $_SESSION variables can no longer be used. You can always try to save the $_SESSION in another variable;
session_start();
$_SESSION['test'] = 'foo';
Next page:
session_start();
$saveSession = $_SESSION;
session_destroy();
var_dump($_SESSION); //Gives an empty array
var_dump($saveSession); //Still has ['test' => 'foo']
More information: http://php.net/manual/en/function.session-destroy.php and http://php.net/manual/en/book.session.php
Also, sidenote, you do not need to open and close PHP tags if they are combined;
<?php
session_start();
echo $_SESSION["name"];
?>
works just as well as
<?php
session_start();
?>
<?php
echo $_SESSION["name"];
?>