<?php

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/**

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* Blocks API: WP_Block class

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*

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* @package WordPress

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* @since 5.5.0

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*/

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/**

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* Class representing a parsed instance of a block.

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*

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* @since 5.5.0

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* @property array $attributes

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*/

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class WP_Block {

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/**

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* Original parsed array representation of block.

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*

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* @since 5.5.0

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* @var array

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*/

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public $parsed_block;

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/**

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* Name of block.

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*

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* @example "core/paragraph"

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*

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* @since 5.5.0

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* @var string

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*/

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public $name;

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/**

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* Block type associated with the instance.

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*

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* @since 5.5.0

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* @var WP_Block_Type

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*/

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public $block_type;

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/**

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* Block context values.

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*

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* @since 5.5.0

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* @var array

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*/

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public $context = array();

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/**

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* All available context of the current hierarchy.

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*

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* @since 5.5.0

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* @var array

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* @access protected

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*/

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protected $available_context;

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/**

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* List of inner blocks (of this same class)

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*

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* @since 5.5.0

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* @var WP_Block[]

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*/

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public $inner_blocks = array();

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/**

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* Resultant HTML from inside block comment delimiters after removing inner

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* blocks.

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*

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* @example "...Just <!-- wp:test /--> testing..." -> "Just testing..."

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*

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* @since 5.5.0

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* @var string

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*/

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public $inner_html = '';

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/**

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* List of string fragments and null markers where inner blocks were found

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*

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* @example array(

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* 'inner_html' => 'BeforeInnerAfter',

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* 'inner_blocks' => array( block, block ),

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* 'inner_content' => array( 'Before', null, 'Inner', null, 'After' ),

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* )

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*

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* @since 5.5.0

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* @var array

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*/

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public $inner_content = array();

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/**

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* Constructor.

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*

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* Populates object properties from the provided block instance argument.

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*

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* The given array of context values will not necessarily be available on

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* the instance itself, but is treated as the full set of values provided by

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* the block's ancestry. This is assigned to the private `available_context`

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* property. Only values which are configured to consumed by the block via

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* its registered type will be assigned to the block's `context` property.

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*

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* @since 5.5.0

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*

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* @param array $block Array of parsed block properties.

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* @param array $available_context Optional array of ancestry context values.

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* @param WP_Block_Type_Registry $registry Optional block type registry.

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*/

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public function __construct( $block, $available_context = array(), $registry = null ) {

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$this->parsed_block = $block;

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$this->name = $block['blockName'];

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if ( is_null( $registry ) ) {

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$registry = WP_Block_Type_Registry::get_instance();

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}

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$this->block_type = $registry->get_registered( $this->name );

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$this->available_context = $available_context;

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if ( ! empty( $this->block_type->uses_context ) ) {

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foreach ( $this->block_type->uses_context as $context_name ) {

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if ( array_key_exists( $context_name, $this->available_context ) ) {

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$this->context[ $context_name ] = $this->available_context[ $context_name ];

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}

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}

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}

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if ( ! empty( $block['innerBlocks'] ) ) {

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$child_context = $this->available_context;

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if ( ! empty( $this->block_type->provides_context ) ) {

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foreach ( $this->block_type->provides_context as $context_name => $attribute_name ) {

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if ( array_key_exists( $attribute_name, $this->attributes ) ) {

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$child_context[ $context_name ] = $this->attributes[ $attribute_name ];

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}

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}

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}

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$this->inner_blocks = new WP_Block_List( $block['innerBlocks'], $child_context, $registry );

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}

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if ( ! empty( $block['innerHTML'] ) ) {

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$this->inner_html = $block['innerHTML'];

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}

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if ( ! empty( $block['innerContent'] ) ) {

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$this->inner_content = $block['innerContent'];

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}

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}

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/**

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* Returns a value from an inaccessible property.

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*

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* This is used to lazily initialize the `attributes` property of a block,

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* such that it is only prepared with default attributes at the time that

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* the property is accessed. For all other inaccessible properties, a `null`

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* value is returned.

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*

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* @since 5.5.0

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*

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* @param string $name Property name.

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* @return array|null Prepared attributes, or null.

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*/

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public function __get( $name ) {

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if ( 'attributes' === $name ) {

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$this->attributes = isset( $this->parsed_block['attrs'] ) ?

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$this->parsed_block['attrs'] :

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array();

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if ( ! is_null( $this->block_type ) ) {

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$this->attributes = $this->block_type->prepare_attributes_for_render( $this->attributes );

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}

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return $this->attributes;

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}

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return null;

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}

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/**

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* Generates the render output for the block.

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*

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* @since 5.5.0

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*

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* @param array $options {

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* Optional options object.

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*

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* @type bool $dynamic Defaults to 'true'. Optionally set to false to avoid using the block's render_callback.

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* }

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* @return string Rendered block output.

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*/

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public function render( $options = array() ) {

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global $post;

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$options = wp_parse_args(

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$options,

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array(

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'dynamic' => true,

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)

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);

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$is_dynamic = $options['dynamic'] && $this->name && null !== $this->block_type && $this->block_type->is_dynamic();

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$block_content = '';

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if ( ! $options['dynamic'] || empty( $this->block_type->skip_inner_blocks ) ) {

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$index = 0;

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foreach ( $this->inner_content as $chunk ) {

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$block_content .= is_string( $chunk ) ?

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$chunk :

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$this->inner_blocks[ $index++ ]->render();

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}

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}

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if ( $is_dynamic ) {

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$global_post = $post;

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$parent = WP_Block_Supports::$block_to_render;

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WP_Block_Supports::$block_to_render = $this->parsed_block;

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$block_content = (string) call_user_func( $this->block_type->render_callback, $this->attributes, $block_content, $this );

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WP_Block_Supports::$block_to_render = $parent;

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$post = $global_post;

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}

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if ( ! empty( $this->block_type->script ) ) {

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wp_enqueue_script( $this->block_type->script );

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}

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if ( ! empty( $this->block_type->style ) ) {

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wp_enqueue_style( $this->block_type->style );

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}

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/**

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* Filters the content of a single block.

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*

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* @since 5.0.0

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*

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* @param string $block_content The block content about to be appended.

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* @param array $block The full block, including name and attributes.

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*/

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$block_content = apply_filters( 'render_block', $block_content, $this->parsed_block );

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/**

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* Filters the content of a single block.

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*

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* The dynamic portion of the hook name, `$name`, refers to

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* the block name, e.g. "core/paragraph".

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*

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* @since 5.7.0

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*

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* @param string $block_content The block content about to be appended.

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* @param array $block The full block, including name and attributes.

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*/

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$block_content = apply_filters( "render_block_{$this->name}", $block_content, $this->parsed_block );

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return $block_content;

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}

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}

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