building a function with an optional argument

[Colin F]

Originally Posted by sabret00the

how would i go about doing the above

PHP Code:

function getpiece($id = FALSE)

    global $p;

    if (!$p)
    {
        $p = intval($id); // if $p exists $id won't exist
    } 


how would i go about doing this?

if, in the functions arguments, you define something with a =, it'll use that value if nothing is entered.

so you can do this:

PHP Code:

function foo($firstvar)
{
} 


this

PHP Code:

function foo($firstvar = 'standardvalue')
{
} 


this

PHP Code:

function foo($firstvar = 'standardvalue', $secondvar = 'standardaswell')
{
} 


this,

PHP Code:

function foo($firstvar, $secondvar = 'standard')
{
} 


and so on.

Any arguments that are needed have to be at the beginning though.