Function definition with optional parameters?

[Phester]

Some of the functions that are part of PHP have optional parameters. Is
it possible to define your own function so that it has optional
parameters? If so, how is that done?

Thanks,

Phester

vilefesteringsc um
at
yahoo

[Andy Hassall]

Re: Function definition with optional parameters?

On Sun, 28 Sep 2003 20:20:33 GMT, Phester <phester@nonexi stenthost.com> wrote:
[color=blue]
>Some of the functions that are part of PHP have optional parameters. Is
>it possible to define your own function so that it has optional
>parameters? If so, how is that done?[/color]

Certainly; you can give the optional parameters default values.

http://www.php.net/manual/en/functions.arguments.php

--
Andy Hassall (andy@andyh.co. uk) icq(5747695) (http://www.andyh.co.uk)
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[Pedro]

Re: Function definition with optional parameters?

Phester wrote:[color=blue]
> Is
> it possible to define your own function so that it has optional
> parameters?[/color]

Yes.

[color=blue]
> If so, how is that done?[/color]

Define a function, giving the last parameters a default value

<?php
function xyz($a, $b, $c=0, $d='localhost') {
// do nothing :-)
}

### and then call it
xyz(0, 0, 3, 'yahoo.com');
xyz(0, 0, 4); // same as xyz(0, 0, 4, 'localhost');
xyz(0, 0); // same as xyz(0, 0, 0, 'localhost');
?>

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[Phester]

Re: Function definition with optional parameters?

Andy Hassall wrote:[color=blue]
> On Sun, 28 Sep 2003 20:20:33 GMT, Phester <phester@nonexi stenthost.com> wrote:
>[color=green]
>>Some of the functions that are part of PHP have optional parameters. Is
>>it possible to define your own function so that it has optional
>>parameters? If so, how is that done?[/color]
>
> Certainly; you can give the optional parameters default values.
>
> http://www.php.net/manual/en/functions.arguments.php
>
> --
> Andy Hassall (andy@andyh.co. uk) icq(5747695) (http://www.andyh.co.uk)
> Space: disk usage analysis tool (http://www.andyhsoftware.co.uk/space)[/color]


Thanks!

Phester

[Phester]

Re: Function definition with optional parameters?

Pedro wrote:[color=blue]
> Phester wrote:
>[color=green]
>>Is
>>it possible to define your own function so that it has optional
>>parameters?[/color][/color]

....
[color=blue]
> Define a function, giving the last parameters a default value
>
> <?php
> function xyz($a, $b, $c=0, $d='localhost') {
> // do nothing :-)
> }
>
> ### and then call it
> xyz(0, 0, 3, 'yahoo.com');
> xyz(0, 0, 4); // same as xyz(0, 0, 4, 'localhost');
> xyz(0, 0); // same as xyz(0, 0, 0, 'localhost');
> ?>[/color]


Thanks, that's exactly what's required.

Phester