Plugin Name: Overrides all standard Q2A pages My freelancer job ask for change page or form in page or function like login/register ... of Q2A(question2answer).
I go to search and read manual how to overrides function of Q2A [1]
Plugin overrides (requires Q2A 1.5+) can replace or wrap over 150 functions defined within the Q2A core. Overrides can be very powerful, but they run a risk of incompatibility with future versions of Q2A. If possible, it is recommended to use modules or layers instead. Nonetheless, some things can only be done via overrides, and future versions of Q2A will try not to break them.
Not all functions in Q2A can be overridden. To check a particular function, see whether its definition begins with:
if (qa_to_override(FUNCTION)) ...
Functions are overridden by redefining them in a PHP file in your plugin directory, then calling qa_register_plugin_overrides() with the name of that file in qa-plugin.php. Here is a simple example of a PHP file which overrides qa_retrieve_url():