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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )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.
| Line | Code |
|---|---|
| 580 | function start_el($output, $category, $depth, $args) { |
| 581 | extract($args); |
| 582 | |
| 583 | $cat_name = attribute_escape( $category->cat_name); |
| 584 | $cat_name = apply_filters( 'list_cats', $cat_name, $category ); |
| 585 | $link = '<a href="' . get_category_link( $category->cat_ID ) . '" '; |
| 586 | if ( $use_desc_for_title == 0 || empty($category->category_description) ) |
| 587 | $link .= 'title="' . sprintf(__( 'View all posts filed under %s' ), $cat_name) . '"'; |
| 588 | else |
| 589 | $link .= 'title="' . attribute_escape( apply_filters( 'category_description', $category->category_description, $category )) . '"'; |
| 590 | $link .= '>'; |
| 591 | $link .= $cat_name . '</a>'; |
| 592 | |
| 593 | if ( (! empty($feed_image)) || (! empty($feed)) ) { |
| 594 | $link .= ' '; |
| 595 | |
| 596 | if ( empty($feed_image) ) |
| 597 | $link .= '('; |
| 598 | |