[wp-hackers] Hooks, Actions, Filters

[Jeremy Visser]

On Wed, 2009-07-29 at 08:38 +0200, Bruno Alexandre wrote:
> the idea is to override the get_title() method in order to erase the
> "Protected: " sentence from the title if the page is protected, there is a
> protected_title_format filter, and I thought using it ...

> $protected_title_format = apply_filters('protected_title_format',
> __('Protected: %s'));

What you need is something like this:

        function remove_protected_title_format($s) {
                return str_replace('Protected: ', '', $s);
        }
        
        add_filter('protected_title_format',
          'remove_protected_title_format');

To help you understand it, look at the original code:

        $protected_title_format =
          apply_filters('protected_title_format', __('Protected: %s'));

So the string is *starting out* as 'Protected: %s'. We can't change
that, because that is what is fed into the filter. However, we can
change it after it has been fed into the filter. So...

[Start]		$protected_title_format = 'Protected: %s'
[Apply filters]	call remove_protected_title_format()
		  -- strips out 'Protected: ' of variable
[Finish]	$protected_title_format = '%s'

And that is what gets ultimately assigned to the variable.

Hope this helps,
Jeremy.