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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 |
|---|---|
| 4073 | $to_ping = preg_split('/\s/', $to_ping, -1, PREG_SPLIT_NO_EMPTY); |
| 4074 | |
| 4075 | /** |
| 4076 | * Filter the list of URLs yet to ping for the given post. |
| 4077 | * |
| 4078 | * @since 2.0.0 |
| 4079 | * |
| 4080 | * @param array $to_ping List of URLs yet to ping. |
| 4081 | */ |
| 4082 | $to_ping = apply_filters( 'get_to_ping', $to_ping ); |
| 4083 | return $to_ping; |
| 4084 | } |
| 4085 | |
| 4086 | /** |
| 4087 | * Do trackbacks for a list of URLs. |
| 4088 | * |
| 4089 | * @since 1.0.0 |
| 4090 | * |
| 4091 | * @param string $tb_list Comma separated list of URLs. |