Filters the block being rendered in render_block() , before it’s processed.

Parameters

$parsed_blockarray

An associative 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.

$source_blockarray

An un-modified copy of $parsed_block, as it appeared in the source content.
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.

Source

$parsed_block = apply_filters( 'render_block_data', $parsed_block, $source_block, $parent_block );

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