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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 |
|---|---|
| 3019 | * |
| 3020 | * @param int $post_id The ID in the database table of the post being published |
| 3021 | */ |
| 3022 | function _publish_post_hook($post_id) { |
| 3023 | global $wpdb; |
| 3024 | |
| 3025 | if ( defined('XMLRPC_REQUEST') ) |
| 3026 | do_action('xmlrpc_publish_post', $post_id); |
| 3027 | if ( defined('APP_REQUEST') ) |
| 3028 | do_action('app_publish_post', $post_id); |
| 3029 | |
| 3030 | if ( defined('WP_IMPORTING') ) |
| 3031 | return; |
| 3032 | |
| 3033 | $data = array( 'post_id' => $post_id, 'meta_value' => '1' ); |
| 3034 | if ( get_option('default_pingback_flag') ) |
| 3035 | $wpdb->insert( $wpdb->postmeta, $data + array( 'meta_key' => '_pingme' ) ); |
| 3036 | $wpdb->insert( $wpdb->postmeta, $data + array( 'meta_key' => '_encloseme' ) ); |
| 3037 | wp_schedule_single_event(time(), 'do_pings'); |