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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 |
|---|---|
| 1543 | $page_rewrite = apply_filters('page_rewrite_rules', $page_rewrite); |
| 1544 | |
| 1545 | // Extra permastructs |
| 1546 | foreach ( $this->extra_permastructs as $permastructname => $permastruct ) { |
| 1547 | if ( is_array($permastruct) ) |
| 1548 | $rules = $this->generate_rewrite_rules($permastruct[0], $permastruct[1]); |
| 1549 | else |
| 1550 | $rules = $this->generate_rewrite_rules($permastruct, EP_NONE); |
| 1551 | |
| 1552 | $rules = apply_filters($permastructname . '_rewrite_rules', $rules); |
| 1553 | if ( 'post_tag' == $permastructname ) |
| 1554 | $rules = apply_filters('tag_rewrite_rules', $rules); |
| 1555 | |
| 1556 | $this->extra_rules_top = array_merge($this->extra_rules_top, $rules); |
| 1557 | } |
| 1558 | |
| 1559 | // Put them together. |
| 1560 | if ( $this->use_verbose_page_rules ) |
| 1561 | $this->rules = array_merge($this->extra_rules_top, $robots_rewrite, $default_feeds, $registration_pages, $page_rewrite, $root_rewrite, $comments_rewrite, $search_rewrite, $author_rewrite, $date_rewrite, $post_rewrite, $this->extra_rules); |