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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 |
---|---|
5103 | $to_ping = preg_split( '/\s/', $to_ping, -1, PREG_SPLIT_NO_EMPTY ); |
5104 |
|
5105 | /** |
5106 | * Filters the list of URLs yet to ping for the given post. |
5107 | * |
5108 | * @since 2.0.0 |
5109 | * |
5110 | * @param string[] $to_ping List of URLs yet to ping. |
5111 | */ |
5112 | return apply_filters( 'get_to_ping', $to_ping ); |
5113 | } |
5114 |
|
5115 | /** |
5116 | * Do trackbacks for a list of URLs. |
5117 | * |
5118 | * @since 1.0.0 |
5119 | * |
5120 | * @param string $tb_list Comma separated list of URLs. |
5121 | * @param int $post_id Post ID. |