building a function with an optional argument

[sabret00the]

how would i go about doing the above

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?

[Colin F]

how would i go about doing the above

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:

function foo($firstvar)
{
}this
function foo($firstvar = 'standardvalue')
{
}this
function foo($firstvar = 'standardvalue', $secondvar = 'standardaswell')
{
}this,
function foo($firstvar, $secondvar = 'standard')
{
}and so on.

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

[Andreas]

I don't understand your question?

[sabret00the]

basically i have the function getpiece

function getpiece($id = 'nothere')
{
global $vboptions, $stylevar, $vbphrase, $bgclass, $DB_site, $p;

if ($id != "nothere")
{
$p = $id;
}

$getthepiece = $DB_site->query_first("
## query ##
");

return $getthepiece;

most of the times i call getpiece() via
$array = getpiece(); // for this is uses the $p

but i need to call it in another function with $array = getpiece($pieceid); // because $p doesn't exist

[Andreas]

I still don't get what you want, but maybe it's this:


function getpiece()
{
global $vboptions, $stylevar, $vbphrase, $bgclass, $DB_site, $p;

if (func_num_args() > 0)
{
// Called with Parameters, so we take the first parameter as $id
$id = func_get_arg(0);
}
else
{
// Called with no Parameters, so we take $p as $id
$id = $p;
}

$getthepiece = $DB_site->query_first("

[Paul M]

Difficult to answer without seeing the query - does it pull some data based on the value of $p ?

Why don't you just make the first one ;

$array = getpiece($p);

and then just make the function return the appropiate data from the query using $id.

[sabret00the]

thanks all for your help, in the end i got it to work using function($var) for both calls