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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 |
---|---|
2952 | * Returning a truthy value to the filter will effectively short-circuit |
2953 | * the new post being inserted, returning 0. If $wp_error is true, a WP_Error |
2954 | * will be returned instead. |
2955 | * |
2956 | * @since 3.3.0 |
2957 | * |
2958 | * @param bool $maybe_empty Whether the post should be considered "empty". |
2959 | * @param array $postarr Array of post data. |
2960 | */ |
2961 | if ( apply_filters( 'wp_insert_post_empty_content', $maybe_empty, $postarr ) ) { |
2962 | if ( $wp_error ) { |
2963 | return new WP_Error( 'empty_content', __( 'Content, title, and excerpt are empty.' ) ); |
2964 | } else { |
2965 | return 0; |
2966 | } |
2967 | } |
2968 |
|
2969 | $post_status = empty( $postarr['post_status'] ) ? 'draft' : $postarr['post_status']; |
2970 | if ( 'attachment' === $post_type && ! in_array( $post_status, array( 'inherit', 'private', 'trash' ) ) ) { |