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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 |
|---|---|
| 31 | $category = &get_category($category_id); |
| 32 | $category_nicename = $category->category_nicename; |
| 33 | |
| 34 | if ( $parent = $category->category_parent ) |
| 35 | $category_nicename = get_category_parents($parent, false, '/', true) . $category_nicename . '/'; |
| 36 | |
| 37 | $catlink = str_replace('%category%', $category_nicename, $catlink); |
| 38 | $catlink = get_settings('home') . trailingslashit($catlink); |
| 39 | } |
| 40 | return apply_filters('category_link', $catlink, $category_id); |
| 41 | } |
| 42 | |
| 43 | function get_the_category_list($separator = '', $parents='') { |
| 44 | $categories = get_the_category(); |
| 45 | if (empty($categories)) |
| 46 | return apply_filters('the_category', __('Uncategorized'), $separator, $parents); |
| 47 | |
| 48 | $thelist = ''; |
| 49 | if ( '' == $separator ) { |