This function’s access is marked private. This means it is not intended for use by plugin or theme developers, only in other core functions. It is listed here for completeness.

_publish_post_hook( int $post_id )

Hook to schedule pings and enclosures when a post is published.

Description

Uses XMLRPC_REQUEST and WP_IMPORTING constants.

Parameters

$post_id

(Required) The ID in the database table of the post being published.

Source

File: wp-includes/post.php 

function _publish_post_hook( $post_id ) {
	if ( defined( 'XMLRPC_REQUEST' ) ) {
		/**
		 * Fires when _publish_post_hook() is called during an XML-RPC request.
		 *
		 * @since WP-2.1.0
		 *
		 * @param int $post_id Post ID.
		 */
		do_action( 'xmlrpc_publish_post', $post_id );
	}

	if ( defined('WP_IMPORTING') )
		return;

	if ( get_option('default_pingback_flag') )
		add_post_meta( $post_id, '_pingme', '1' );
	add_post_meta( $post_id, '_encloseme', '1' );

	if ( ! wp_next_scheduled( 'do_pings' ) ) {
		wp_schedule_single_event( time(), 'do_pings' );
	}
}

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Related

Uses

Uses
Uses Description
wp-includes/cron.php: wp_next_scheduled()

Retrieve the next timestamp for an event.
wp-includes/cron.php: wp_schedule_single_event()

Schedules an event to run only once.
wp-includes/plugin.php: do_action()

Execute functions hooked on a specific action hook.
wp-includes/option.php: get_option()

Retrieves an option value based on an option name.
wp-includes/post.php: xmlrpc_publish_post

Fires when _publish_post_hook() is called during an XML-RPC request.
wp-includes/post.php: add_post_meta()

Add meta data field to a post.
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Changelog

Changelog
Version Description
WP-2.3.0 Introduced.