pre_render_block – Hook | Developer.WordPress.org

Allows render_block() to be short-circuited, by returning a non-null value.

Parameters

$pre_renderstring|null

The pre-rendered content. Default null.

$parsed_blockarray

A representative array of the block being rendered. See WP_Block_Parser_Block.

blockName string
Name of block.
attrs array
Attributes from block comment delimiters.
innerBlocks array[]
List of inner blocks. An array of arrays that have the same structure as this one.
innerHTML string
HTML from inside block comment delimiters.
innerContent array
List of string fragments and null markers where inner blocks were found.

$parent_blockWP_Block|null

If this is a nested block, a reference to the parent block.

$pre_render = apply_filters( 'pre_render_block', null, $parsed_block, $parent_block );

Used by	Description
WP_Block::render()`wp-includes/class-wp-block.php`	Generates the render output for the block.
render_block()`wp-includes/blocks.php`	Renders a single block into a HTML string.

Version	Description
5.9.0	The `$parent_block` parameter was added.
5.1.0	Introduced.