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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 |
|---|---|
| 5748 | $to_ping = preg_split( '/\s/', $to_ping, -1, PREG_SPLIT_NO_EMPTY ); |
| 5749 | |
| 5750 | /** |
| 5751 | * Filters the list of URLs yet to ping for the given post. |
| 5752 | * |
| 5753 | * @since 2.0.0 |
| 5754 | * |
| 5755 | * @param string[] $to_ping List of URLs yet to ping. |
| 5756 | */ |
| 5757 | return apply_filters( 'get_to_ping', $to_ping ); |
| 5758 | } |
| 5759 | |
| 5760 | /** |
| 5761 | * Does trackbacks for a list of URLs. |
| 5762 | * |
| 5763 | * @since 1.0.0 |
| 5764 | * |
| 5765 | * @param string $tb_list Comma separated list of URLs. |
| 5766 | * @param int $post_id Post ID. |