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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 |
|---|---|
| 1850 | * Filters the list of blocks that can contribute to the excerpt. |
| 1851 | * |
| 1852 | * If a dynamic block is added to this list, it must not generate another |
| 1853 | * excerpt, as this will cause an infinite loop to occur. |
| 1854 | * |
| 1855 | * @since 5.0.0 |
| 1856 | * |
| 1857 | * @param string[] $allowed_blocks The list of names of allowed blocks. |
| 1858 | */ |
| 1859 | $allowed_blocks = apply_filters( 'excerpt_allowed_blocks', $allowed_blocks ); |
| 1860 | $blocks = parse_blocks( $content ); |
| 1861 | $output = ''; |
| 1862 | |
| 1863 | foreach ( $blocks as $block ) { |
| 1864 | if ( in_array( $block['blockName'], $allowed_blocks, true ) ) { |
| 1865 | if ( ! empty( $block['innerBlocks'] ) ) { |
| 1866 | if ( in_array( $block['blockName'], $allowed_wrapper_blocks, true ) ) { |
| 1867 | $output .= _excerpt_render_inner_blocks( $block, $allowed_blocks ); |
| 1868 | continue; |