How can I write my own page in moodle?

Question

• I want to write my own page in moodle that call with a link on the blocks (left side of the page)

  when I click that link I want to load my page (php) in the region field without change the other parts of the page

• note that the link is added by mine

Answer 1

If it must be a php page the easiest way to do this is to

1. copy the index.php page in the root directory
2. replace everything between print_container_start() (right after middle-column column is printed) and print_container_end() with your code
3. Optional - delete conditionals that checks moodle version numbers

omitting step three shouldn't do any harm it will just make some needless upgrade checks.