Defining a Function

You can define a function using the function statement:

function some_function( $argument1, $argument2 ) {
   // function code here
}

The name of the function follows the function statement and precedes a set of parentheses. If your function is to require arguments, you must place comma-separated variable names within the parentheses. These variables are filled by the values passed to your function. If your function requires no arguments, you must nevertheless supply the parentheses.

Listing 6.2 declares a function.

Listing 6.2. Declaring a Function
 1: <!DOCTYPE html PUBLIC
 2:    "-//W3C//DTD XHTML 1.0 Strict//EN"
 3:    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
 4: <html>
 5: <head>
 6: <title>Listing 6.2 Declaring a Function</title> ...

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