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[closed]

add_filter calling origin function

(6 posts)
  • Started 1 year ago by turbobutton
  • Latest reply from helgatheviking
  • This topic is resolved

  1. turbobutton
    Member

    superb system design. great use of hooks and filters.

    so im looking to add (prepend or append) a div tag (or any other content ) in each post header -- but dont want to remove the original content.

    it seems that the filters actually replace the original function..

    something like the following pseudocode:

    function childtheme_thematic_postheader
    {
    //my new stuff
    echo <div class='myclass' ></div>

    //then onto original content
    call original function
    }

    add_filter( 'thematic_postheader', 'childtheme_thematic_postheader');

    Posted 1 year ago #

  2. turbobutton
    Member

    alternatively, a way of adding a hook into THE_LOOP or post loop

    both would be good to know

    Posted 1 year ago #

  3. helgatheviking
    Moderator

    filters don't HAVE to completely replace content. it all depends on whether you set a new value for the variable you are passing or if you concatenate and just take more stuff on..

    see my explanation of filters:
    http://themeshaper.com/forums/topic/need-help-understanding-actions-vs-filters-and-changing-post-meta-and-utility#post-22638

    your example would be modified to be:

    function childtheme_thematic_postheader($postheader)
{
//the $postheader variable is set to something totally new, but the original is tacked on to the end with the period
$postheader = '<div class="myclass" ></div>' . $postheader;

// to do it the other way and tack it to the end you'd use a period in front of the equal sign
// $postheader .= '<div class="endclass">bacon</div>';

//with filters you must always return the variable back to the original function
return $postheader;
}

add_filter( 'thematic_postheader', 'childtheme_thematic_postheader');
    Posted 1 year ago #

  4. turbobutton
    Member

    oh right. i completely forgot the diff between hooks and filters. THANK YOU!

    Posted 1 year ago #

  5. turbobutton
    Member

    btw. thanks for the bacon reference. i love bacon! little piggies are in trouble because they're so delicious.

    Posted 1 year ago #

  6. helgatheviking
    Moderator

    bacon rules. and makes much more delicious dummy content than lorem ipsum. don't forget to mark as resolved.

    Posted 1 year ago #

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