PHP, MYSQL Interview Questions

1. Please tell me the latest version of PHP with the detail explanation of the newly added features in PHP. Also who is the father of PHP?
2. In PHP, both GET and POST method serves the same feature to get the data in variable. Still there is a lots of difference between the both. Can anyone please explain it in detail with the case where we can use GET and POST method in PHP.
3. Is it possible to submit the form data into database without creating a submit button in PHP? So far i am using submit button in my php application. If possible then please post an example code.
4. In how many ways we can store and retrive the date in result set of mysql using PHP scripting language?
5. I'm aware of the difference between mysqlfetchobject and mysqlfetcharray that object will fetch the first records from the matching data where as mysqlfetcharray will store all the matching records in an array. However and i am unable to implement it into my program. So, can anyone please post an example of mysqlfetchobject and mysqlfetcharray in PHP?
6. What is the difference between $message and $$message? While printing the value i found that both contains the same value. So, i am bit confused and wonderind if $$message is a reference Variable?. Please explain.
7. What is the regular expression and how we can use to get a particulr string from a given string in PHP? For example how can we get the domain name of website from the full URL path?
8. In my PHP application, i have a requirement to create a new database everytime a user request to create a new database in mysql. So far i have created only tables in mysql using php code. So, just wondering how to create a database using PHP script?
9. In reference to PHP scripting language, What is the difference between require and include? And in which case we can use required function in PHP?
10. What is include in php? How how many times a file can be included in the application? If i wants to include any file onlcy once in my program then how can i do so??