Mobile Detect is a lightweight PHP class for detecting mobile devices (including tablets). It uses the User-Agent string combined with specific HTTP headers to detect the mobile environment.

You may consider this script as being part of the RESS (Responsive Web Design with Server-Side Component) movement. You can find out more on the topic by reading these articles: Improve Mobile Support With Server-Side-Enhanced Responsive Design and RESS: Responsive Design + Server Side Components.

You can also benefit from Mobile Detect by using any of the 3rd party plugins available for: Wordpress, Drupal, Joomla, Magento, etc.

Everyone uses different kinds of mobile devices built using different mobile operating systems.The two popular mobile Operating system are iOS and Android since these two contribute majority of market share.

Not just two,windows phone 7,blackberry OS are also popular in mobile space.So if you are a developer who want to build applications for mobile ? the very first obvious question that rise in your mind would be “which platform to choose ?”

Developers often choose a platform which reaches to more people or devices hence they develop applications in one common language and deploy them to all the popular platforms at once-This is called as cross platform mobile development.