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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 |
|---|---|
| 667 | * @param bool $display Optional, default is true. Whether to display or retrieve title. |
| 668 | * @return string|null Title when retrieving, null when displaying or failure. |
| 669 | */ |
| 670 | function single_post_title($prefix = '', $display = true) { |
| 671 | $_post = get_queried_object(); |
| 672 | |
| 673 | if ( !isset($_post->post_title) ) |
| 674 | return; |
| 675 | |
| 676 | $title = apply_filters('single_post_title', $_post->post_title, $_post); |
| 677 | if ( $display ) |
| 678 | echo $prefix . $title; |
| 679 | else |
| 680 | return $title; |
| 681 | } |
| 682 | |
| 683 | /** |
| 684 | * Display or retrieve title for a post type archive. |
| 685 | * |