Passing argument = null ?

[robchuah]

Hi there,

I am just wondering, if there is a funciton like this

function DummyFunction ($config = null) {

// function code here

}

What does that $config = null means ? What is the difference between doing a null operation on $config versus normally where we just leave $config as parameter ?

Thanks
Rob

[edcellgavin]

yes there is. it means that the $config param is optional and is initialized with the value at the right side of the equation (in this case, it is initialized with a null value) when the function is called.

[robchuah]

Thanks. That is real clear