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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 |
|---|---|
| 92 | /** |
| 93 | * Fires when a requested block template part does not exist in the database nor in the theme. |
| 94 | * |
| 95 | * @since 5.9.0 |
| 96 | * |
| 97 | * @param string $template_part_id The requested template part namespaced to the theme. |
| 98 | * @param array $attributes The block attributes. |
| 99 | * @param string $template_part_file_path Absolute path to the not found template path. |
| 100 | */ |
| 101 | do_action( 'render_block_core_template_part_none', $template_part_id, $attributes, $template_part_file_path ); |
| 102 | } |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | if ( is_null( $content ) && is_user_logged_in() ) { |
| 107 | if ( ! isset( $attributes['slug'] ) ) { |
| 108 | // If there is no slug this is a placeholder and we dont want to return any message. |
| 109 | return; |
| 110 | } |