Create your own Functions 

1. An Introduction to Functions

A function is just a piece of code,that you want to use not once but again and again. Functions save you from writing the code again and again. A function always return a value.

2. Variable scope and functions

function function_name( )

{

}

3. Functions and Arguments

You can pass variable to your functions by typing them inside of the round brackets of the function name.

<?

function myFunction($variable1,$variable2)

{

    echo $variable1;

}

// Using Function

$variable1="Some Text";

$variable2=100;

myFunction($variable1,$variable2);

?>

4. Getting values out of functions

Getting some calculated value from function.

Get a discout value.

<?

$spent_money = 150;
echo calculate($spent_money);

function calculate($spent_money)

{
    $discount = 0.1;

    if ($spent_money > 100)

    {
        $discount_total = $spent_money - ($spent_money * $discount);
        $discount = $discount_total;
    }
    else

    {
        $discount = "No discount";
    }
    return $discount;
}

?>

5. HTTP Header() Function

<?
header("Location: http://www.visualbuilder.com/");
?>

6. The INCLUDE( ) Function
<? include "somefile.txt" ; ?>

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