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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 |
---|---|
4882 | $new = implode( "\n", $pung ); |
4883 |
|
4884 | /** |
4885 | * Filters the new ping URL to add for the given post. |
4886 | * |
4887 | * @since 2.0.0 |
4888 | * |
4889 | * @param string $new New ping URL to add. |
4890 | */ |
4891 | $new = apply_filters( 'add_ping', $new ); |
4892 |
|
4893 | $return = $wpdb->update( $wpdb->posts, array( 'pinged' => $new ), array( 'ID' => $post->ID ) ); |
4894 | clean_post_cache( $post->ID ); |
4895 | return $return; |
4896 | } |
4897 |
|
4898 | /** |
4899 | * Retrieve enclosures already enclosed for a post. |
4900 | * |