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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 |
|---|---|
| 842 | $this->extra_rules_top = array_merge($this->extra_rules_top, $this->generate_rewrite_rules($permastruct, EP_NONE)); |
| 843 | |
| 844 | // Put them together. |
| 845 | if ( $this->use_verbose_page_rules ) |
| 846 | $this->rules = array_merge($this->extra_rules_top, $robots_rewrite, $default_feeds, $page_rewrite, $root_rewrite, $comments_rewrite, $search_rewrite, $category_rewrite, $tag_rewrite, $author_rewrite, $date_rewrite, $post_rewrite, $this->extra_rules); |
| 847 | else |
| 848 | $this->rules = array_merge($this->extra_rules_top, $robots_rewrite, $default_feeds, $root_rewrite, $comments_rewrite, $search_rewrite, $category_rewrite, $tag_rewrite, $author_rewrite, $date_rewrite, $post_rewrite, $page_rewrite, $this->extra_rules); |
| 849 | |
| 850 | do_action_ref_array('generate_rewrite_rules', array(&$this)); |
| 851 | $this->rules = apply_filters('rewrite_rules_array', $this->rules); |
| 852 | |
| 853 | return $this->rules; |
| 854 | } |
| 855 | |
| 856 | function wp_rewrite_rules() { |
| 857 | $this->rules = get_option('rewrite_rules'); |
| 858 | if ( empty($this->rules) ) { |
| 859 | $this->matches = 'matches'; |
| 860 | $this->rewrite_rules(); |