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  Some tricks on PHP session

1. Session timeout problem There is a nuance we found with session timing out although the user is still active in the session.  The problem has to do with never modifying the session variable. The GC will clear the session data files based on their last modification time.  Thus if you never modify the session, you simply read from it, then the GC will eventually clean up. To prevent this you need to ensure that your session is modified within the GC delete time.  You can accomp...

   PHP,Session,Timeout,Solution,Various domain     2015-03-13 07:05:37

  Foursquare : 20 million users and 2 billion check-ins

Yesterday was the Foursquare third annual 4sqDay celebration (Four - squared open four square, ie April 16), this mobile phone service site which is based on user location information confirmed that their users reached 20 million and there were two billion check-ins.Foursquare was founded in 2009 and it is a mobile phone service website based on the user location information .It encourages mobile phone users to share their current geographic location and other information with others. In co...

   Fpoursquare,Check-in,4sqDay     2012-04-17 13:39:14

  Configure a PHP web server on CentOS

Are you used to use cPanel or Plesk on VPS for your PHP website management? If for some reason you don't want to use them? What can you do? How do you maintain your website? How do you access Emails, use FTP to upload files or use phpMyAdmin to manage your databases? You may need to configure all these services yourself on a VPS without cPanel or Plesk or other similar apps.But to configure all these services on a Linux server is not an easy job. You may spend many nights but still fail to get s...

   Cron,Linux,CentOS,Email,FTP,MySQL     2012-07-08 06:01:56

  How Cloud Computing is changing the Face of Business

The world of information is getting bigger and bigger and so does the need for cloud computing is felt broadly across various industries and platforms. The ever growing popularity and adoption are due to the fact that cloud computing is efficient, reliable and secure than any other business model. However, the way cloud computing is adopted across different enterprises may vary. How cloud computing has been adopted worldwide by companies- let us have a look at few statistics that would blow you...

   CLOUD COMPUTING,SOFTWARE DEVELOPMENT,CLOUD SERVICES,CLOUD SOLUTION,SOFTWARE SOLUTIONS     2017-08-22 02:49:53

  My favorite quotes from "The design and evolution of C++"

"The design and evolution of C++" is a book written by the inventor of C++  Bjarne stroustrup. In this book, Bjarne stroustrup presents the definitive insider's guide to the design and development of the C++ programming language. Without ommitting critical details or getting bogged down in technicalities, Stroustrup presents his unique insights into the decisions that shaped C++. In this book, some statements are very impressive. They are concise but convey much information. Here I summariz...

   C++,statements,type system,compatibility     2012-07-16 10:58:10

  Focus of Baidu in the future

In addition to the new generation "Baidu ladies", The biggest highlight of the annual meeting of Baidu is undoubtedly the passionate speech delivered by CEO Yanhong Li with a "Zoro" suite. He emphasized four business focus of Baidu in the future, i.e the traditional search, mobile cloud, LBS and international strategy. Although the strategy is clear, but what's more important is that there must be some corresponding products to align with these focus. How will Baidu carry out four key business?...

   Baidu, Anuual meeting, LBS,Baidu Cloud     2013-01-23 03:51:09

  Is Java Set ordered or not?

“Is Java Set ordered or not? ” is the most popular question asked when you interview for a Java Developer position. Many fail to answer it, and I have to admit I was one of the many. I have known the answer is “Yes and No” for a long time. No. HashSet is not ordered. Yes.TreeSet is ordered. If the interviewer continues with some follow up questions, I’m not confident that I know the answer then. Why is TreeSet ordered? Are there any other ordered S...

   ORDER,SORTEDSET,HASHSET,JAVA     2021-02-11 06:55:00

  All I Know About Certificates -- Clients

 Finally, in last article we’ve covered the responsibilities of CAs, showing that being a CA isn’t simple and has high management costs, explaining why issuing certificates costs money! This article we will cover the client in this chain. Verifying Certificates as a Client For clients, verifying certificates isn’t simple either. Articles introducing TLS handshakes often mention "the server sends back a certificate, and the client verifies it," but in reality, as ...

   CLIENTS,WEBSITES,SSL CERTIFICATE,CERTIFICATE AUTHORITY,CA     2024-07-26 22:24:30

  7 revolutionary electronic products

Electronic products can be seen everywhere in our lives. There are several revolutionary electronic products which affect people's life deeply. The following are seven representative electronic products.1. Motorola DynaTACIt is the ancestor of cellphone. DynaTAC is a series of cellular telephones manufactured by Motorola, Inc. from 1983 to 1994. The first model, the 8000x, received FCC certification in 1983,and became the first cell phone to be offered commercially. It weighs 2.5 pounds and can ...

   Electronic products,iPod,ATARI,DynaTAC     2012-07-31 14:27:33

  HTML5 and Accessibility

Accessibility for people with disabilities is a legal responsibility in many countries. It's also the right thing to do, and one of the characteristics distinguishing professional developers from the WWWs: WYSIWYG-wielding wannabes. But for many, accessibility has been a somewhat black art, requiring adding extra stuff to your code like alt text, table summaries, ARIA information that can be difficult to test by developers who are not assistive technology users themselves.The arrival of HTML5 ha...

   HTML5,Accessibility,Video,Music,Canvas     2011-08-19 08:13:44

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