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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 |
|---|---|
| 4470 | * Returning a truthy value from the filter will effectively short-circuit |
| 4471 | * the new post being inserted and return 0. If $wp_error is true, a WP_Error |
| 4472 | * will be returned instead. |
| 4473 | * |
| 4474 | * @since 3.3.0 |
| 4475 | * |
| 4476 | * @param bool $maybe_empty Whether the post should be considered "empty". |
| 4477 | * @param array $postarr Array of post data. |
| 4478 | */ |
| 4479 | if ( apply_filters( 'wp_insert_post_empty_content', $maybe_empty, $postarr ) ) { |
| 4480 | if ( $wp_error ) { |
| 4481 | return new WP_Error( 'empty_content', __( 'Content, title, and excerpt are empty.' ) ); |
| 4482 | } else { |
| 4483 | return 0; |
| 4484 | } |
| 4485 | } |
| 4486 | |
| 4487 | $post_status = empty( $postarr['post_status'] ) ? 'draft' : $postarr['post_status']; |
| 4488 | |