Setcookie不行?

我在Twitter应用程序的回调页面中定期设置cookies。一切正常。

// js/main.js
$('#settings-form').live('submit', function() {
    $.post('controllers/settings.php', $(this).serialize(), function(data) { // Everything here works.
        if (data == 'OK') // no errors spits out "OK". this works
            changeView({'msg': 'Your settings were saved successfully.'}); // This just resets the view and adds a message div at the top. This works
        else
            changeView({'msg': data}); // This echoes the error if any exists. Doesn't happen, no errors arise
    });
    return false; // Cancels redirecting after submitting form
});

// controllers/settings.php
setcookie('user_settings', serialize($_POST), strtotime('+1 year'));

我检查了所有的变量,甚至尝试为test设置虚拟变量(比如“boo”而不是serialize($\u POST)。因为某种原因,那是行不通的。