Question

I just have found out that there is a function called func_get_arg in PHP which enables developer to use variant style of getting arguments.
It seems to be very useful because number of argument can now be arbitrary, but I cannot think of any good example of using it.

What are the some examples of using this function to fully benefit its polymorphic characteristic?

Answer 1

I usually use func_get_args() which is easier to use if wanting multiple arguments.

For example, to recreate PHP’s max().

function max() {
   $max = -PHP_INT_MAX;
   foreach(func_get_args() as $arg) {
      if ($arg > $max) {
          $max = $arg;
      }
   }
   return $max;
}

CodePad.

Now you can do echo max(1,5,7,3) and get 7.