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Functions (cont)

Example for default parameter values: 

function makeCoffee($type="latte", $size="big") {
    return "Making a $size cup of $type.\n";
}
echo makeCoffee();
echo makeCoffee("cappucino");
echo makeCoffee("espresso","tiny");

which will display 

Making a big cup of latte.
Making a big cup of cappucino.
Making a tiny cup of espresso.