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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 |
|---|---|
| 736 | if ( is_null( $parent ) ) { |
| 737 | break; |
| 738 | } |
| 739 | |
| 740 | $this->current_level++; |
| 741 | $find_main_page = (int) $parent->post_parent; |
| 742 | |
| 743 | if ( ! isset( $parent_name ) ) { |
| 744 | /** This filter is documented in wp-includes/post-template.php */ |
| 745 | $parent_name = apply_filters( 'the_title', $parent->post_title, $parent->ID ); |
| 746 | } |
| 747 | } |
| 748 | } |
| 749 | } |
| 750 | |
| 751 | $pad = str_repeat( '— ', $this->current_level ); |
| 752 | echo "<strong>"; |
| 753 | |
| 754 | $format = get_post_format( $post->ID ); |