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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 |
|---|---|
| 1071 | $tb_url = get_option('siteurl') . '/wp-trackback.php?p=' . get_the_ID(); |
| 1072 | |
| 1073 | /** |
| 1074 | * Filter the returned trackback URL. |
| 1075 | * |
| 1076 | * @since 2.2.0 |
| 1077 | * |
| 1078 | * @param string $tb_url The trackback URL. |
| 1079 | */ |
| 1080 | return apply_filters( 'trackback_url', $tb_url ); |
| 1081 | } |
| 1082 | |
| 1083 | /** |
| 1084 | * Display the current post's trackback URL. |
| 1085 | * |
| 1086 | * @since 0.71 |
| 1087 | * |
| 1088 | * @param bool $deprecated_echo Not used. |
| 1089 | * @return void|string Should only be used to echo the trackback URL, use get_trackback_url() |