We can find out the difference between two given dates in PHP very easily. Consider the following PHP script:
I think there is no way yet to find out screen resolution with PHP. hehehe. If I am wrong please correct me. But yet we can trick it to be happen ;-) If not then how can we be developers. Right! With javascript we find out screen resolution of PC. Store it in a cookie [...]
Use this simple test for checking or detecting user’s browser information.
function_exists — Return TRUE if the given function has been defined. To check that whether a function is defined or exists or not use function_exists. Checks the list of defined functions, both built-in (internal) and user-defined, for function_name. Returns TRUE on success or FALSE on failure.
