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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 |
|---|---|
| 145 | * Filters the list of blocks that can contribute to the excerpt. |
| 146 | * |
| 147 | * If a dynamic block is added to this list, it must not generate another |
| 148 | * excerpt, as this will cause an infinite loop to occur. |
| 149 | * |
| 150 | * @since 4.4.0 |
| 151 | * |
| 152 | * @param array $allowed_blocks The list of allowed blocks. |
| 153 | */ |
| 154 | $allowed_blocks = apply_filters( 'excerpt_allowed_blocks', $allowed_blocks ); |
| 155 | $blocks = parse_blocks( $content ); |
| 156 | $output = ''; |
| 157 | foreach ( $blocks as $block ) { |
| 158 | if ( in_array( $block['blockName'], $allowed_blocks, true ) ) { |
| 159 | $output .= render_block( $block ); |
| 160 | } |
| 161 | } |
| 162 | return $output; |
| 163 | } |