What is the good example of using 'func_get_arg' in PHP?
<p>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.</p>

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