Getting the gender and age of a web user

Hi, I need the implementation in php or other programming language of the automatic extracting GENDER and AGE user without ask to the web user. Are you able to do that? We will start this project discovering the gender and age of the user, but we will continue working discovering more demographics and psychographics. You can use and research any techniques or methodologies you like: • Cookies • Usability • Behavior analysis • other Your work is to: 1. Research how to extract the gender and age of a web user without ask. 2. Define a methodology to use. 3. Code in php or other programming language. 4. Test your accuracy. For example do you know how this example sites work? [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] Did you understand my requirements? Budget: 100 USA Thank you