[PHP] 保護configuration file

Don't place the config file in web root
Protect with htaccess
chmod your config file

sudo find /var/www/ -type d -exec chmod 755 {} \;
sudo find /var/www/ -type f -exec chmod 644 {} \;

[Javascript] 取得過去時間與現在時間差距

function timeSince(date) {

    var seconds = Math.floor((new Date().getTime() - date) / 1000);

    var interval = Math.floor(seconds / 31536000);

    if (interval >= 1) {

        return interval + " years ago";

    }

    interval = Math.floor(seconds / 2592000);

    if (interval >= 1) {

        return interval + " months ago";

    }

    interval = Math.floor(seconds / 86400);

    if (interval >= 1) {

        return interval + " days ago";

    }

    interval = Math.floor(seconds / 3600);

    if (interval >= 1) {

        return interval + " hours ago";

    }

    interval = Math.floor(seconds / 60);

    if (interval >= 1) {

        return interval + " minutes ago";

    }

    return Math.floor(seconds) + " seconds ago";

}