ZEND PREP :returning function in php

we can get a result from a function only by using return or echo keywords. so, if there is no return or echo,then the function will not give any output. let's zend mock certification question for php 5.

Question:

What is the output of the following?



Answer:

1. 0
2. 36
3. 6
4. 30
5. 5
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