[wp-hackers] hooks & future posts

[James Collins]

Hi Matt,
The default for add_action() / add_filter() is that it will pass 1 argument
to your function unless otherwise specified. So if you just do:

add_action('action_name', 'do_stuff');

Then do_stuff() will have be sent a single argument.

If the filter/action requires more than 1 argument, then you must manually
specify it like you've done:

add_action('action_name', 'do_stuff', 10, 3);

Regards,

James Collins

OM4 - Website Design and Development
OM4.com.au | OM4Tourism.com



2009/9/21 Matt Martz <matt at sivel.net>

> On Sun, Sep 20, 2009 at 05:13:31PM +0100, Peter Westwood wrote:
> > <?php
> > add_action('future_to_publish', 'do_stuff', 10, 1);
> > function do_stuff( $in ) {
> >  $f = fopen( dirname(__FILE__).'/log.log', 'a' );
> >  fwrite( $f, "\nBefore\n" );
> >  fwrite( $f, print_r($in, true) );
> >  fwrite( $f, "\nAfter\n" );
> >  fclose( $f );
> >  return $in;
> > }
> > ?>
>
> I think the key here is to notice that add_action/do_action by default does
> not
> pass any arguments to your callback.  So to get it to pass any ammount
> of arguments you need to specify that in your add_action, hence the
> specification of '1' in Peter's example for add_action.
>
> --
> Matt Martz
> matt at sivel.net
> http://sivel.net/
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