What are the possible ways to insert data into a MySql database from a webpage?

[avi converter]

I need to insert a data into mysql database when submit button is pressed and I must return the status in a message box. I use php. The sad thing is on page load the code to insert data executes, which must not happen. I have written the php code on the head section I need to insert data only on submit. While I was exploring how to do that I am interested in knowing the possible ways to insert data into MySql database from a web page.

Kindly help me with two things
1. What are the possible ways to insert data into a MySql database from a web page
2. Suggest a solution for the problem stated above( unexpected execution of code on page load )
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