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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 |
|---|---|
| 222 | |
| 223 | /** |
| 224 | * Allows render_block() to be shortcircuited, by returning a non-null value. |
| 225 | * |
| 226 | * @since 5.1.0 |
| 227 | * |
| 228 | * @param string $pre_render The pre-rendered content. Default null. |
| 229 | * @param array $block The block being rendered. |
| 230 | */ |
| 231 | $pre_render = apply_filters( 'pre_render_block', null, $block ); |
| 232 | if ( ! is_null( $pre_render ) ) { |
| 233 | return $pre_render; |
| 234 | } |
| 235 | |
| 236 | $source_block = $block; |
| 237 | |
| 238 | /** |
| 239 | * Filters the block being rendered in render_block(), before it's processed. |
| 240 | * |