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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 |
|---|---|
| 3802 | $to_ping = preg_split('/\s/', $to_ping, -1, PREG_SPLIT_NO_EMPTY); |
| 3803 | |
| 3804 | /** |
| 3805 | * Filter the list of URLs yet to ping for the given post. |
| 3806 | * |
| 3807 | * @since 2.0.0 |
| 3808 | * |
| 3809 | * @param array $to_ping List of URLs yet to ping. |
| 3810 | */ |
| 3811 | $to_ping = apply_filters( 'get_to_ping', $to_ping ); |
| 3812 | return $to_ping; |
| 3813 | } |
| 3814 | |
| 3815 | /** |
| 3816 | * Do trackbacks for a list of URLs. |
| 3817 | * |
| 3818 | * @since 1.0.0 |
| 3819 | * |
| 3820 | * @param string $tb_list Comma separated list of URLs |