Php会话不起作用

I am new to php, and very new to sessions, so I have no idea what I am doing wrong. I followed the tutorial on tizag, and put this code on my site:

<?php

session_start();

echo SID . "<br><br>";

if(isset($_SESSION['views'])) {
    $_SESSION['views'] = $_SESSION['views'] + 1;
} else {
    $_SESSION['views'] = 1;
    echo "views = ". $_SESSION['views']; 
}

?>

The SID changes whenever I refresh, and the number does not count up.

Update: Url: http://121.73.150.105/PIA/

FIXED BY: Putting session_start() before my doctype, title etc.

Are cookies enabled in you're browser ? phpsessid is stored as a cookie , you can set different parameters for it , one that could be usefull in you're case could be session_get_cookie_params() , and see if everithing is oki with the session cookie params .

If anything is wrong like expiration date you can set the params with session_set_cookie_params()

You don't output the $_SESSION['view'] after the if statement. I think that's why it doesn't change.

Try:

<?php

session_start();

echo SID . "<br><br>";

if(isset($_SESSION['views'])) {
    $_SESSION['views'] = $_SESSION['views'] + 1;
} else {
    $_SESSION['views'] = 1;
}

echo "views = ". $_SESSION['views'];     

?>

So you always output the new $_SESSION['views'] value.

EDIT: I think the right answer is that the session is not set. But I'm curious, how can the code always outputs "view = 1"? Can I open a new question referencing this question or just discuss it here?

Your PHP setup may have been configured to not save sessions in cookies.

To verify if this is the case, you can take a look at session.use_cookies in your php.ini, or using ini_get, like so:

<?php echo ini_get('session.use-cookies'); ?>

You can correct it at runtime, as well, using ini_set, like so:

<?php ini_set('session.use-cookies', '1'); ?>

either you are outputting something to the browser before calling session start, or you have cookies disabled.

in your code if you cant see session ID you can write session_id() in place of SID.

ini_set("session.use_cookies",1);
ini_set("session.use_only_cookies",1);

this two parameter must set to gether if you want it work