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Source View: {$option}

To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).

Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

  • Action hooks look like this: do_action( "hook_name" )
  • Filter hooks look like this: apply_filters( "hook_name", "what_to_filter" ).

Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.

Source View

Line Code
918                     $per_page = 20;
919           }
920
921           if ( 'edit_comments_per_page' == $option ) {
922                $comment_status = isset( $_REQUEST['comment_status'] ) ? $_REQUEST['comment_status'] : 'all';
923                $per_page = apply_filters( 'comments_per_page', $per_page, $comment_status );
924           } elseif ( 'categories_per_page' == $option ) {
925                $per_page = apply_filters( 'edit_categories_per_page', $per_page );
926           } else {
927                $per_page = apply_filters( $option, $per_page );
928           }
929
930           // Back compat
931           if ( isset( $this->post_type ) )
932                $per_page = apply_filters( 'edit_posts_per_page', $per_page, $this->post_type );
933
934           ?>
935           <h5><?php _ex('Show on screen', 'Screen Options') ?></h5>
936           <div class='screen-options'>