How to call a specific function in a PHP script via Ajax?

Question

Lets say I have a file called functions.php, and it has two separate functions inside:

One would get the time

And the other would get the date

How will I

Answer 1

you can add a parameter to the url:

example:

function.php?g=1

now, on the serverside check for the get parameter:

if($_GET['g']==1)
{
    echo date();
}
else
{
    echo time();
}