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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 |
|---|---|
| 888 | |
| 889 | /** |
| 890 | * Filter the page title for a single post. |
| 891 | * |
| 892 | * @since 0.71 |
| 893 | * |
| 894 | * @param string $_post_title The single post page title. |
| 895 | * @param object $_post The current queried object as returned by get_queried_object(). |
| 896 | */ |
| 897 | $title = apply_filters( 'single_post_title', $_post->post_title, $_post ); |
| 898 | if ( $display ) |
| 899 | echo $prefix . $title; |
| 900 | else |
| 901 | return $prefix . $title; |
| 902 | } |
| 903 | |
| 904 | /** |
| 905 | * Display or retrieve title for a post type archive. |
| 906 | * |