_func_array(
$callback,
array( &$parent_block, 'last_child', $hooked_blocks, $context )
);
}
return $markup;
};
}
/**
* Given an array of attributes, returns a string in the serialized attributes
* format prepared for post content.
*
* The serialized result is a JSON-encoded string, with unicode escape sequence
* substitution for characters which might otherwise interfere with embedding
* the result in an HTML comment.
*
* This function must produce output that remains in sync with the output of
* the serializeAttributes JavaScript function in the block editor in order
* to ensure consistent operation between PHP and JavaScript.
*
* @since 5.3.1
*
* @param array $block_attributes Attributes object.
* @return string Serialized attributes.
*/
function serialize_block_attributes( $block_attributes ) {
$encoded_attributes = wp_json_encode( $block_attributes, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE );
$encoded_attributes = preg_replace( '/--/', '\\u002d\\u002d', $encoded_attributes );
$encoded_attributes = preg_replace( '//', '\\u003e', $encoded_attributes );
$encoded_attributes = preg_replace( '/&/', '\\u0026', $encoded_attributes );
// Regex: /\\"/
$encoded_attributes = preg_replace( '/\\\\"/', '\\u0022', $encoded_attributes );
return $encoded_attributes;
}
/**
* Returns the block name to use for serialization. This will remove the default
* "core/" namespace from a block name.
*
* @since 5.3.1
*
* @param string|null $block_name Optional. Original block name. Null if the block name is unknown,
* e.g. Classic blocks have their name set to null. Default null.
* @return string Block name to use for serialization.
*/
function strip_core_block_namespace( $block_name = null ) {
if ( is_string( $block_name ) && str_starts_with( $block_name, 'core/' ) ) {
return substr( $block_name, 5 );
}
return $block_name;
}
/**
* Returns the content of a block, including comment delimiters.
*
* @since 5.3.1
*
* @param string|null $block_name Block name. Null if the block name is unknown,
* e.g. Classic blocks have their name set to null.
* @param array $block_attributes Block attributes.
* @param string $block_content Block save content.
* @return string Comment-delimited block content.
*/
function get_comment_delimited_block_content( $block_name, $block_attributes, $block_content ) {
if ( is_null( $block_name ) ) {
return $block_content;
}
$serialized_block_name = strip_core_block_namespace( $block_name );
$serialized_attributes = empty( $block_attributes ) ? '' : serialize_block_attributes( $block_attributes ) . ' ';
if ( empty( $block_content ) ) {
return sprintf( '', $serialized_block_name, $serialized_attributes );
}
return sprintf(
'%s',
$serialized_block_name,
$serialized_attributes,
$block_content,
$serialized_block_name
);
}
/**
* Returns the content of a block, including comment delimiters, serializing all
* attributes from the given parsed block.
*
* This should be used when preparing a block to be saved to post content.
* Prefer `render_block` when preparing a block for display. Unlike
* `render_block`, this does not evaluate a block's `render_callback`, and will
* instead preserve the markup as parsed.
*
* @since 5.3.1
*
* @param array $block {
* An associative array of a single parsed block object. See WP_Block_Parser_Block.
*
* @type string $blockName Name of block.
* @type array $attrs Attributes from block comment delimiters.
* @type array[] $innerBlocks List of inner blocks. An array of arrays that
* have the same structure as this one.
* @type string $innerHTML HTML from inside block comment delimiters.
* @type array $innerContent List of string fragments and null markers where
* inner blocks were found.
* }
* @return string String of rendered HTML.
*/
function serialize_block( $block ) {
$block_content = '';
$index = 0;
foreach ( $block['innerContent'] as $chunk ) {
$block_content .= is_string( $chunk ) ? $chunk : serialize_block( $block['innerBlocks'][ $index++ ] );
}
if ( ! is_array( $block['attrs'] ) ) {
$block['attrs'] = array();
}
return get_comment_delimited_block_content(
$block['blockName'],
$block['attrs'],
$block_content
);
}
/**
* Returns a joined string of the aggregate serialization of the given
* parsed blocks.
*
* @since 5.3.1
*
* @param array[] $blocks {
* Array of block structures.
*
* @type array ...$0 {
* An associative array of a single parsed block object. See WP_Block_Parser_Block.
*
* @type string $blockName Name of block.
* @type array $attrs Attributes from block comment delimiters.
* @type array[] $innerBlocks List of inner blocks. An array of arrays that
* have the same structure as this one.
* @type string $innerHTML HTML from inside block comment delimiters.
* @type array $innerContent List of string fragments and null markers where
* inner blocks were found.
* }
* }
* @return string String of rendered HTML.
*/
function serialize_blocks( $blocks ) {
return implode( '', array_map( 'serialize_block', $blocks ) );
}
/**
* Traverses a parsed block tree and applies callbacks before and after serializing it.
*
* Recursively traverses the block and its inner blocks and applies the two callbacks provided as
* arguments, the first one before serializing the block, and the second one after serializing it.
* If either callback returns a string value, it will be prepended and appended to the serialized
* block markup, respectively.
*
* The callbacks will receive a reference to the current block as their first argument, so that they
* can also modify it, and the current block's parent block as second argument. Finally, the
* `$pre_callback` receives the previous block, whereas the `$post_callback` receives
* the next block as third argument.
*
* Serialized blocks are returned including comment delimiters, and with all attributes serialized.
*
* This function should be used when there is a need to modify the saved block, or to inject markup
* into the return value. Prefer `serialize_block` when preparing a block to be saved to post content.
*
* This function is meant for internal use only.
*
* @since 6.4.0
* @access private
*
* @see serialize_block()
*
* @param array $block An associative array of a single parsed block object. See WP_Block_Parser_Block.
* @param callable $pre_callback Callback to run on each block in the tree before it is traversed and serialized.
* It is called with the following arguments: &$block, $parent_block, $previous_block.
* Its string return value will be prepended to the serialized block markup.
* @param callable $post_callback Callback to run on each block in the tree after it is traversed and serialized.
* It is called with the following arguments: &$block, $parent_block, $next_block.
* Its string return value will be appended to the serialized block markup.
* @return string Serialized block markup.
*/
function traverse_and_serialize_block( $block, $pre_callback = null, $post_callback = null ) {
$block_content = '';
$block_index = 0;
foreach ( $block['innerContent'] as $chunk ) {
if ( is_string( $chunk ) ) {
$block_content .= $chunk;
} else {
$inner_block = $block['innerBlocks'][ $block_index ];
if ( is_callable( $pre_callback ) ) {
$prev = 0 === $block_index
? null
: $block['innerBlocks'][ $block_index - 1 ];
$block_content .= call_user_func_array(
$pre_callback,
array( &$inner_block, &$block, $prev )
);
}
if ( is_callable( $post_callback ) ) {
$next = count( $block['innerBlocks'] ) - 1 === $block_index
? null
: $block['innerBlocks'][ $block_index + 1 ];
$post_markup = call_user_func_array(
$post_callback,
array( &$inner_block, &$block, $next )
);
}
$block_content .= traverse_and_serialize_block( $inner_block, $pre_callback, $post_callback );
$block_content .= isset( $post_markup ) ? $post_markup : '';
++$block_index;
}
}
if ( ! is_array( $block['attrs'] ) ) {
$block['attrs'] = array();
}
return get_comment_delimited_block_content(
$block['blockName'],
$block['attrs'],
$block_content
);
}
/**
* Replaces patterns in a block tree with their content.
*
* @since 6.6.0
*
* @param array $blocks An array blocks.
*
* @return array An array of blocks with patterns replaced by their content.
*/
function resolve_pattern_blocks( $blocks ) {
static $inner_content;
// Keep track of seen references to avoid infinite loops.
static $seen_refs = array();
$i = 0;
while ( $i < count( $blocks ) ) {
if ( 'core/pattern' === $blocks[ $i ]['blockName'] ) {
$attrs = $blocks[ $i ]['attrs'];
if ( empty( $attrs['slug'] ) ) {
++$i;
continue;
}
$slug = $attrs['slug'];
if ( isset( $seen_refs[ $slug ] ) ) {
// Skip recursive patterns.
array_splice( $blocks, $i, 1 );
continue;
}
$registry = WP_Block_Patterns_Registry::get_instance();
$pattern = $registry->get_registered( $slug );
// Skip unknown patterns.
if ( ! $pattern ) {
++$i;
continue;
}
$blocks_to_insert = parse_blocks( $pattern['content'] );
$seen_refs[ $slug ] = true;
$prev_inner_content = $inner_content;
$inner_content = null;
$blocks_to_insert = resolve_pattern_blocks( $blocks_to_insert );
$inner_content = $prev_inner_content;
unset( $seen_refs[ $slug ] );
array_splice( $blocks, $i, 1, $blocks_to_insert );
// If we have inner content, we need to insert nulls in the
// inner content array, otherwise serialize_blocks will skip
// blocks.
if ( $inner_content ) {
$null_indices = array_keys( $inner_content, null, true );
$content_index = $null_indices[ $i ];
$nulls = array_fill( 0, count( $blocks_to_insert ), null );
array_splice( $inner_content, $content_index, 1, $nulls );
}
// Skip inserted blocks.
$i += count( $blocks_to_insert );
} else {
if ( ! empty( $blocks[ $i ]['innerBlocks'] ) ) {
$prev_inner_content = $inner_content;
$inner_content = $blocks[ $i ]['innerContent'];
$blocks[ $i ]['innerBlocks'] = resolve_pattern_blocks(
$blocks[ $i ]['innerBlocks']
);
$blocks[ $i ]['innerContent'] = $inner_content;
$inner_content = $prev_inner_content;
}
++$i;
}
}
return $blocks;
}
/**
* Given an array of parsed block trees, applies callbacks before and after serializing them and
* returns their concatenated output.
*
* Recursively traverses the blocks and their inner blocks and applies the two callbacks provided as
* arguments, the first one before serializing a block, and the second one after serializing.
* If either callback returns a string value, it will be prepended and appended to the serialized
* block markup, respectively.
*
* The callbacks will receive a reference to the current block as their first argument, so that they
* can also modify it, and the current block's parent block as second argument. Finally, the
* `$pre_callback` receives the previous block, whereas the `$post_callback` receives
* the next block as third argument.
*
* Serialized blocks are returned including comment delimiters, and with all attributes serialized.
*
* This function should be used when there is a need to modify the saved blocks, or to inject markup
* into the return value. Prefer `serialize_blocks` when preparing blocks to be saved to post content.
*
* This function is meant for internal use only.
*
* @since 6.4.0
* @access private
*
* @see serialize_blocks()
*
* @param array[] $blocks An array of parsed blocks. See WP_Block_Parser_Block.
* @param callable $pre_callback Callback to run on each block in the tree before it is traversed and serialized.
* It is called with the following arguments: &$block, $parent_block, $previous_block.
* Its string return value will be prepended to the serialized block markup.
* @param callable $post_callback Callback to run on each block in the tree after it is traversed and serialized.
* It is called with the following arguments: &$block, $parent_block, $next_block.
* Its string return value will be appended to the serialized block markup.
* @return string Serialized block markup.
*/
function traverse_and_serialize_blocks( $blocks, $pre_callback = null, $post_callback = null ) {
$result = '';
$parent_block = null; // At the top level, there is no parent block to pass to the callbacks; yet the callbacks expect a reference.
$pre_callback_is_callable = is_callable( $pre_callback );
$post_callback_is_callable = is_callable( $post_callback );
foreach ( $blocks as $index => $block ) {
if ( $pre_callback_is_callable ) {
$prev = 0 === $index
? null
: $blocks[ $index - 1 ];
$result .= call_user_func_array(
$pre_callback,
array( &$block, &$parent_block, $prev )
);
}
if ( $post_callback_is_callable ) {
$next = count( $blocks ) - 1 === $index
? null
: $blocks[ $index + 1 ];
$post_markup = call_user_func_array(
$post_callback,
array( &$block, &$parent_block, $next )
);
}
$result .= traverse_and_serialize_block( $block, $pre_callback, $post_callback );
$result .= isset( $post_markup ) ? $post_markup : '';
}
return $result;
}
/**
* Filters and sanitizes block content to remove non-allowable HTML
* from parsed block attribute values.
*
* @since 5.3.1
*
* @param string $text Text that may contain block content.
* @param array[]|string $allowed_html Optional. An array of allowed HTML elements and attributes,
* or a context name such as 'post'. See wp_kses_allowed_html()
* for the list of accepted context names. Default 'post'.
* @param string[] $allowed_protocols Optional. Array of allowed URL protocols.
* Defaults to the result of wp_allowed_protocols().
* @return string The filtered and sanitized content result.
*/
function filter_block_content( $text, $allowed_html = 'post', $allowed_protocols = array() ) {
$result = '';
if ( str_contains( $text, '' ) ) {
$text = preg_replace_callback( '%%', '_filter_block_content_callback', $text );
}
$blocks = parse_blocks( $text );
foreach ( $blocks as $block ) {
$block = filter_block_kses( $block, $allowed_html, $allowed_protocols );
$result .= serialize_block( $block );
}
return $result;
}
/**
* Callback used for regular expression replacement in filter_block_content().
*
* @since 6.2.1
* @access private
*
* @param array $matches Array of preg_replace_callback matches.
* @return string Replacement string.
*/
function _filter_block_content_callback( $matches ) {
return '';
}
/**
* Filters and sanitizes a parsed block to remove non-allowable HTML
* from block attribute values.
*
* @since 5.3.1
*
* @param WP_Block_Parser_Block $block The parsed block object.
* @param array[]|string $allowed_html An array of allowed HTML elements and attributes,
* or a context name such as 'post'. See wp_kses_allowed_html()
* for the list of accepted context names.
* @param string[] $allowed_protocols Optional. Array of allowed URL protocols.
* Defaults to the result of wp_allowed_protocols().
* @return array The filtered and sanitized block object result.
*/
function filter_block_kses( $block, $allowed_html, $allowed_protocols = array() ) {
$block['attrs'] = filter_block_kses_value( $block['attrs'], $allowed_html, $allowed_protocols, $block );
if ( is_array( $block['innerBlocks'] ) ) {
foreach ( $block['innerBlocks'] as $i => $inner_block ) {
$block['innerBlocks'][ $i ] = filter_block_kses( $inner_block, $allowed_html, $allowed_protocols );
}
}
return $block;
}
/**
* Filters and sanitizes a parsed block attribute value to remove
* non-allowable HTML.
*
* @since 5.3.1
* @since 6.5.5 Added the `$block_context` parameter.
*
* @param string[]|string $value The attribute value to filter.
* @param array[]|string $allowed_html An array of allowed HTML elements and attributes,
* or a context name such as 'post'. See wp_kses_allowed_html()
* for the list of accepted context names.
* @param string[] $allowed_protocols Optional. Array of allowed URL protocols.
* Defaults to the result of wp_allowed_protocols().
* @param array $block_context Optional. The block the attribute belongs to, in parsed block array format.
* @return string[]|string The filtered and sanitized result.
*/
function filter_block_kses_value( $value, $allowed_html, $allowed_protocols = array(), $block_context = null ) {
if ( is_array( $value ) ) {
foreach ( $value as $key => $inner_value ) {
$filtered_key = filter_block_kses_value( $key, $allowed_html, $allowed_protocols, $block_context );
$filtered_value = filter_block_kses_value( $inner_value, $allowed_html, $allowed_protocols, $block_context );
if ( isset( $block_context['blockName'] ) && 'core/template-part' === $block_context['blockName'] ) {
$filtered_value = filter_block_core_template_part_attributes( $filtered_value, $filtered_key, $allowed_html );
}
if ( $filtered_key !== $key ) {
unset( $value[ $key ] );
}
$value[ $filtered_key ] = $filtered_value;
}
} elseif ( is_string( $value ) ) {
return wp_kses( $value, $allowed_html, $allowed_protocols );
}
return $value;
}
/**
* Sanitizes the value of the Template Part block's `tagName` attribute.
*
* @since 6.5.5
*
* @param string $attribute_value The attribute value to filter.
* @param string $attribute_name The attribute name.
* @param array[]|string $allowed_html An array of allowed HTML elements and attributes,
* or a context name such as 'post'. See wp_kses_allowed_html()
* for the list of accepted context names.
* @return string The sanitized attribute value.
*/
function filter_block_core_template_part_attributes( $attribute_value, $attribute_name, $allowed_html ) {
if ( empty( $attribute_value ) || 'tagName' !== $attribute_name ) {
return $attribute_value;
}
if ( ! is_array( $allowed_html ) ) {
$allowed_html = wp_kses_allowed_html( $allowed_html );
}
return isset( $allowed_html[ $attribute_value ] ) ? $attribute_value : '';
}
/**
* Parses blocks out of a content string, and renders those appropriate for the excerpt.
*
* As the excerpt should be a small string of text relevant to the full post content,
* this function renders the blocks that are most likely to contain such text.
*
* @since 5.0.0
*
* @param string $content The content to parse.
* @return string The parsed and filtered content.
*/
function excerpt_remove_blocks( $content ) {
if ( ! has_blocks( $content ) ) {
return $content;
}
$allowed_inner_blocks = array(
// Classic blocks have their blockName set to null.
null,
'core/freeform',
'core/heading',
'core/html',
'core/list',
'core/media-text',
'core/paragraph',
'core/preformatted',
'core/pullquote',
'core/quote',
'core/table',
'core/verse',
);
$allowed_wrapper_blocks = array(
'core/columns',
'core/column',
'core/group',
);
/**
* Filters the list of blocks that can be used as wrapper blocks, allowing
* excerpts to be generated from the `innerBlocks` of these wrappers.
*
* @since 5.8.0
*
* @param string[] $allowed_wrapper_blocks The list of names of allowed wrapper blocks.
*/
$allowed_wrapper_blocks = apply_filters( 'excerpt_allowed_wrapper_blocks', $allowed_wrapper_blocks );
$allowed_blocks = array_merge( $allowed_inner_blocks, $allowed_wrapper_blocks );
/**
* Filters the list of blocks that can contribute to the excerpt.
*
* If a dynamic block is added to this list, it must not generate another
* excerpt, as this will cause an infinite loop to occur.
*
* @since 5.0.0
*
* @param string[] $allowed_blocks The list of names of allowed blocks.
*/
$allowed_blocks = apply_filters( 'excerpt_allowed_blocks', $allowed_blocks );
$blocks = parse_blocks( $content );
$output = '';
foreach ( $blocks as $block ) {
if ( in_array( $block['blockName'], $allowed_blocks, true ) ) {
if ( ! empty( $block['innerBlocks'] ) ) {
if ( in_array( $block['blockName'], $allowed_wrapper_blocks, true ) ) {
$output .= _excerpt_render_inner_blocks( $block, $allowed_blocks );
continue;
}
// Skip the block if it has disallowed or nested inner blocks.
foreach ( $block['innerBlocks'] as $inner_block ) {
if (
! in_array( $inner_block['blockName'], $allowed_inner_blocks, true ) ||
! empty( $inner_block['innerBlocks'] )
) {
continue 2;
}
}
}
$output .= render_block( $block );
}
}
return $output;
}
/**
* Parses footnotes markup out of a content string,
* and renders those appropriate for the excerpt.
*
* @since 6.3.0
*
* @param string $content The content to parse.
* @return string The parsed and filtered content.
*/
function excerpt_remove_footnotes( $content ) {
if ( ! str_contains( $content, 'data-fn=' ) ) {
return $content;
}
return preg_replace(
'_\s*\d+\s*_',
'',
$content
);
}
/**
* Renders inner blocks from the allowed wrapper blocks
* for generating an excerpt.
*
* @since 5.8.0
* @access private
*
* @param array $parsed_block The parsed block.
* @param array $allowed_blocks The list of allowed inner blocks.
* @return string The rendered inner blocks.
*/
function _excerpt_render_inner_blocks( $parsed_block, $allowed_blocks ) {
$output = '';
foreach ( $parsed_block['innerBlocks'] as $inner_block ) {
if ( ! in_array( $inner_block['blockName'], $allowed_blocks, true ) ) {
continue;
}
if ( empty( $inner_block['innerBlocks'] ) ) {
$output .= render_block( $inner_block );
} else {
$output .= _excerpt_render_inner_blocks( $inner_block, $allowed_blocks );
}
}
return $output;
}
/**
* Renders a single block into a HTML string.
*
* @since 5.0.0
*
* @global WP_Post $post The post to edit.
*
* @param array $parsed_block {
* An associative array of the block being rendered. See WP_Block_Parser_Block.
*
* @type string $blockName Name of block.
* @type array $attrs Attributes from block comment delimiters.
* @type array[] $innerBlocks List of inner blocks. An array of arrays that
* have the same structure as this one.
* @type string $innerHTML HTML from inside block comment delimiters.
* @type array $innerContent List of string fragments and null markers where
* inner blocks were found.
* }
* @return string String of rendered HTML.
*/
function render_block( $parsed_block ) {
global $post;
$parent_block = null;
/**
* Allows render_block() to be short-circuited, by returning a non-null value.
*
* @since 5.1.0
* @since 5.9.0 The `$parent_block` parameter was added.
*
* @param string|null $pre_render The pre-rendered content. Default null.
* @param array $parsed_block {
* An associative array of the block being rendered. See WP_Block_Parser_Block.
*
* @type string $blockName Name of block.
* @type array $attrs Attributes from block comment delimiters.
* @type array[] $innerBlocks List of inner blocks. An array of arrays that
* have the same structure as this one.
* @type string $innerHTML HTML from inside block comment delimiters.
* @type array $innerContent List of string fragments and null markers where
* inner blocks were found.
* }
* @param WP_Block|null $parent_block If this is a nested block, a reference to the parent block.
*/
$pre_render = apply_filters( 'pre_render_block', null, $parsed_block, $parent_block );
if ( ! is_null( $pre_render ) ) {
return $pre_render;
}
$source_block = $parsed_block;
/**
* Filters the block being rendered in render_block(), before it's processed.
*
* @since 5.1.0
* @since 5.9.0 The `$parent_block` parameter was added.
*
* @param array $parsed_block {
* An associative array of the block being rendered. See WP_Block_Parser_Block.
*
* @type string $blockName Name of block.
* @type array $attrs Attributes from block comment delimiters.
* @type array[] $innerBlocks List of inner blocks. An array of arrays that
* have the same structure as this one.
* @type string $innerHTML HTML from inside block comment delimiters.
* @type array $innerContent List of string fragments and null markers where
* inner blocks were found.
* }
* @param array $source_block {
* An un-modified copy of `$parsed_block`, as it appeared in the source content.
* See WP_Block_Parser_Block.
*
* @type string $blockName Name of block.
* @type array $attrs Attributes from block comment delimiters.
* @type array[] $innerBlocks List of inner blocks. An array of arrays that
* have the same structure as this one.
* @type string $innerHTML HTML from inside block comment delimiters.
* @type array $innerContent List of string fragments and null markers where
* inner blocks were found.
* }
* @param WP_Block|null $parent_block If this is a nested block, a reference to the parent block.
*/
$parsed_block = apply_filters( 'render_block_data', $parsed_block, $source_block, $parent_block );
$context = array();
if ( $post instanceof WP_Post ) {
$context['postId'] = $post->ID;
/*
* The `postType` context is largely unnecessary server-side, since the ID
* is usually sufficient on its own. That being said, since a block's
* manifest is expected to be shared between the server and the client,
* it should be included to consistently fulfill the expectation.
*/
$context['postType'] = $post->post_type;
}
/**
* Filters the default context provided to a rendered block.
*
* @since 5.5.0
* @since 5.9.0 The `$parent_block` parameter was added.
*
* @param array $context Default context.
* @param array $parsed_block {
* An associative array of the block being rendered. See WP_Block_Parser_Block.
*
* @type string $blockName Name of block.
* @type array $attrs Attributes from block comment delimiters.
* @type array[] $innerBlocks List of inner blocks. An array of arrays that
* have the same structure as this one.
* @type string $innerHTML HTML from inside block comment delimiters.
* @type array $innerContent List of string fragments and null markers where
* inner blocks were found.
* }
* @param WP_Block|null $parent_block If this is a nested block, a reference to the parent block.
*/
$context = apply_filters( 'render_block_context', $context, $parsed_block, $parent_block );
$block = new WP_Block( $parsed_block, $context );
return $block->render();
}
/**
* Parses blocks out of a content string.
*
* @since 5.0.0
*
* @param string $content Post content.
* @return array[] {
* Array of block structures.
*
* @type array ...$0 {
* An associative array of a single parsed block object. See WP_Block_Parser_Block.
*
* @type string $blockName Name of block.
* @type array $attrs Attributes from block comment delimiters.
* @type array[] $innerBlocks List of inner blocks. An array of arrays that
* have the same structure as this one.
* @type string $innerHTML HTML from inside block comment delimiters.
* @type array $innerContent List of string fragments and null markers where
* inner blocks were found.
* }
* }
*/
function parse_blocks( $content ) {
/**
* Filter to allow plugins to replace the server-side block parser.
*
* @since 5.0.0
*
* @param string $parser_class Name of block parser class.
*/
$parser_class = apply_filters( 'block_parser_class', 'WP_Block_Parser' );
$parser = new $parser_class();
return $parser->parse( $content );
}
/**
* Parses dynamic blocks out of `post_content` and re-renders them.
*
* @since 5.0.0
*
* @param string $content Post content.
* @return string Updated post content.
*/
function do_blocks( $content ) {
$blocks = parse_blocks( $content );
$output = '';
foreach ( $blocks as $block ) {
$output .= render_block( $block );
}
// If there are blocks in this content, we shouldn't run wpautop() on it later.
$priority = has_filter( 'the_content', 'wpautop' );
if ( false !== $priority && doing_filter( 'the_content' ) && has_blocks( $content ) ) {
remove_filter( 'the_content', 'wpautop', $priority );
add_filter( 'the_content', '_restore_wpautop_hook', $priority + 1 );
}
return $output;
}
/**
* If do_blocks() needs to remove wpautop() from the `the_content` filter, this re-adds it afterwards,
* for subsequent `the_content` usage.
*
* @since 5.0.0
* @access private
*
* @param string $content The post content running through this filter.
* @return string The unmodified content.
*/
function _restore_wpautop_hook( $content ) {
$current_priority = has_filter( 'the_content', '_restore_wpautop_hook' );
add_filter( 'the_content', 'wpautop', $current_priority - 1 );
remove_filter( 'the_content', '_restore_wpautop_hook', $current_priority );
return $content;
}
/**
* Returns the current version of the block format that the content string is using.
*
* If the string doesn't contain blocks, it returns 0.
*
* @since 5.0.0
*
* @param string $content Content to test.
* @return int The block format version is 1 if the content contains one or more blocks, 0 otherwise.
*/
function block_version( $content ) {
return has_blocks( $content ) ? 1 : 0;
}
/**
* Registers a new block style.
*
* @since 5.3.0
* @since 6.6.0 Added support for registering styles for multiple block types.
*
* @link https://developer.wordpress.org/block-editor/reference-guides/block-api/block-styles/
*
* @param string|string[] $block_name Block type name including namespace or array of namespaced block type names.
* @param array $style_properties Array containing the properties of the style name, label,
* style_handle (name of the stylesheet to be enqueued),
* inline_style (string containing the CSS to be added),
* style_data (theme.json-like array to generate CSS from).
* See WP_Block_Styles_Registry::register().
* @return bool True if the block style was registered with success and false otherwise.
*/
function register_block_style( $block_name, $style_properties ) {
return WP_Block_Styles_Registry::get_instance()->register( $block_name, $style_properties );
}
/**
* Unregisters a block style.
*
* @since 5.3.0
*
* @param string $block_name Block type name including namespace.
* @param string $block_style_name Block style name.
* @return bool True if the block style was unregistered with success and false otherwise.
*/
function unregister_block_style( $block_name, $block_style_name ) {
return WP_Block_Styles_Registry::get_instance()->unregister( $block_name, $block_style_name );
}
/**
* Checks whether the current block type supports the feature requested.
*
* @since 5.8.0
* @since 6.4.0 The `$feature` parameter now supports a string.
*
* @param WP_Block_Type $block_type Block type to check for support.
* @param string|array $feature Feature slug, or path to a specific feature to check support for.
* @param mixed $default_value Optional. Fallback value for feature support. Default false.
* @return bool Whether the feature is supported.
*/
function block_has_support( $block_type, $feature, $default_value = false ) {
$block_support = $default_value;
if ( $block_type instanceof WP_Block_Type ) {
if ( is_array( $feature ) && count( $feature ) === 1 ) {
$feature = $feature[0];
}
if ( is_array( $feature ) ) {
$block_support = _wp_array_get( $block_type->supports, $feature, $default_value );
} elseif ( isset( $block_type->supports[ $feature ] ) ) {
$block_support = $block_type->supports[ $feature ];
}
}
return true === $block_support || is_array( $block_support );
}
/**
* Converts typography keys declared under `supports.*` to `supports.typography.*`.
*
* Displays a `_doing_it_wrong()` notice when a block using the older format is detected.
*
* @since 5.8.0
*
* @param array $metadata Metadata for registering a block type.
* @return array Filtered metadata for registering a block type.
*/
function wp_migrate_old_typography_shape( $metadata ) {
if ( ! isset( $metadata['supports'] ) ) {
return $metadata;
}
$typography_keys = array(
'__experimentalFontFamily',
'__experimentalFontStyle',
'__experimentalFontWeight',
'__experimentalLetterSpacing',
'__experimentalTextDecoration',
'__experimentalTextTransform',
'fontSize',
'lineHeight',
);
foreach ( $typography_keys as $typography_key ) {
$support_for_key = isset( $metadata['supports'][ $typography_key ] ) ? $metadata['supports'][ $typography_key ] : null;
if ( null !== $support_for_key ) {
_doing_it_wrong(
'register_block_type_from_metadata()',
sprintf(
/* translators: 1: Block type, 2: Typography supports key, e.g: fontSize, lineHeight, etc. 3: block.json, 4: Old metadata key, 5: New metadata key. */
__( 'Block "%1$s" is declaring %2$s support in %3$s file under %4$s. %2$s support is now declared under %5$s.' ),
$metadata['name'],
"$typography_key",
'block.json',
"supports.$typography_key",
"supports.typography.$typography_key"
),
'5.8.0'
);
_wp_array_set( $metadata['supports'], array( 'typography', $typography_key ), $support_for_key );
unset( $metadata['supports'][ $typography_key ] );
}
}
return $metadata;
}
/**
* Helper function that constructs a WP_Query args array from
* a `Query` block properties.
*
* It's used in Query Loop, Query Pagination Numbers and Query Pagination Next blocks.
*
* @since 5.8.0
* @since 6.1.0 Added `query_loop_block_query_vars` filter and `parents` support in query.
* @since 6.7.0 Added support for the `format` property in query.
*
* @param WP_Block $block Block instance.
* @param int $page Current query's page.
*
* @return array Returns the constructed WP_Query arguments.
*/
function build_query_vars_from_query_block( $block, $page ) {
$query = array(
'post_type' => 'post',
'order' => 'DESC',
'orderby' => 'date',
'post__not_in' => array(),
'tax_query' => array(),
);
if ( isset( $block->context['query'] ) ) {
if ( ! empty( $block->context['query']['postType'] ) ) {
$post_type_param = $block->context['query']['postType'];
if ( is_post_type_viewable( $post_type_param ) ) {
$query['post_type'] = $post_type_param;
}
}
if ( isset( $block->context['query']['sticky'] ) && ! empty( $block->context['query']['sticky'] ) ) {
$sticky = get_option( 'sticky_posts' );
if ( 'only' === $block->context['query']['sticky'] ) {
/*
* Passing an empty array to post__in will return have_posts() as true (and all posts will be returned).
* Logic should be used before hand to determine if WP_Query should be used in the event that the array
* being passed to post__in is empty.
*
* @see https://core.trac.wordpress.org/ticket/28099
*/
$query['post__in'] = ! empty( $sticky ) ? $sticky : array( 0 );
$query['ignore_sticky_posts'] = 1;
} else {
$query['post__not_in'] = array_merge( $query['post__not_in'], $sticky );
}
}
if ( ! empty( $block->context['query']['exclude'] ) ) {
$excluded_post_ids = array_map( 'intval', $block->context['query']['exclude'] );
$excluded_post_ids = array_filter( $excluded_post_ids );
$query['post__not_in'] = array_merge( $query['post__not_in'], $excluded_post_ids );
}
if (
isset( $block->context['query']['perPage'] ) &&
is_numeric( $block->context['query']['perPage'] )
) {
$per_page = absint( $block->context['query']['perPage'] );
$offset = 0;
if (
isset( $block->context['query']['offset'] ) &&
is_numeric( $block->context['query']['offset'] )
) {
$offset = absint( $block->context['query']['offset'] );
}
$query['offset'] = ( $per_page * ( $page - 1 ) ) + $offset;
$query['posts_per_page'] = $per_page;
}
// Migrate `categoryIds` and `tagIds` to `tax_query` for backwards compatibility.
if ( ! empty( $block->context['query']['categoryIds'] ) || ! empty( $block->context['query']['tagIds'] ) ) {
$tax_query_back_compat = array();
if ( ! empty( $block->context['query']['categoryIds'] ) ) {
$tax_query_back_compat[] = array(
'taxonomy' => 'category',
'terms' => array_filter( array_map( 'intval', $block->context['query']['categoryIds'] ) ),
'include_children' => false,
);
}
if ( ! empty( $block->context['query']['tagIds'] ) ) {
$tax_query_back_compat[] = array(
'taxonomy' => 'post_tag',
'terms' => array_filter( array_map( 'intval', $block->context['query']['tagIds'] ) ),
'include_children' => false,
);
}
$query['tax_query'] = array_merge( $query['tax_query'], $tax_query_back_compat );
}
if ( ! empty( $block->context['query']['taxQuery'] ) ) {
$tax_query = array();
foreach ( $block->context['query']['taxQuery'] as $taxonomy => $terms ) {
if ( is_taxonomy_viewable( $taxonomy ) && ! empty( $terms ) ) {
$tax_query[] = array(
'taxonomy' => $taxonomy,
'terms' => array_filter( array_map( 'intval', $terms ) ),
'include_children' => false,
);
}
}
$query['tax_query'] = array_merge( $query['tax_query'], $tax_query );
}
if ( ! empty( $block->context['query']['format'] ) && is_array( $block->context['query']['format'] ) ) {
$formats = $block->context['query']['format'];
/*
* Validate that the format is either `standard` or a supported post format.
* - First, add `standard` to the array of valid formats.
* - Then, remove any invalid formats.
*/
$valid_formats = array_merge( array( 'standard' ), get_post_format_slugs() );
$formats = array_intersect( $formats, $valid_formats );
/*
* The relation needs to be set to `OR` since the request can contain
* two separate conditions. The user may be querying for items that have
* either the `standard` format or a specific format.
*/
$formats_query = array( 'relation' => 'OR' );
/*
* The default post format, `standard`, is not stored in the database.
* If `standard` is part of the request, the query needs to exclude all post items that
* have a format assigned.
*/
if ( in_array( 'standard', $formats, true ) ) {
$formats_query[] = array(
'taxonomy' => 'post_format',
'field' => 'slug',
'operator' => 'NOT EXISTS',
);
// Remove the `standard` format, since it cannot be queried.
unset( $formats[ array_search( 'standard', $formats, true ) ] );
}
// Add any remaining formats to the formats query.
if ( ! empty( $formats ) ) {
// Add the `post-format-` prefix.
$terms = array_map(
static function ( $format ) {
return "post-format-$format";
},
$formats
);
$formats_query[] = array(
'taxonomy' => 'post_format',
'field' => 'slug',
'terms' => $terms,
'operator' => 'IN',
);
}
/*
* Add `$formats_query` to `$query`, as long as it contains more than one key:
* If `$formats_query` only contains the initial `relation` key, there are no valid formats to query,
* and the query should not be modified.
*/
if ( count( $formats_query ) > 1 ) {
// Enable filtering by both post formats and other taxonomies by combining them with `AND`.
if ( empty( $query['tax_query'] ) ) {
$query['tax_query'] = $formats_query;
} else {
$query['tax_query'] = array(
'relation' => 'AND',
$query['tax_query'],
$formats_query,
);
}
}
}
if (
isset( $block->context['query']['order'] ) &&
in_array( strtoupper( $block->context['query']['order'] ), array( 'ASC', 'DESC' ), true )
) {
$query['order'] = strtoupper( $block->context['query']['order'] );
}
if ( isset( $block->context['query']['orderBy'] ) ) {
$query['orderby'] = $block->context['query']['orderBy'];
}
if (
isset( $block->context['query']['author'] )
) {
if ( is_array( $block->context['query']['author'] ) ) {
$query['author__in'] = array_filter( array_map( 'intval', $block->context['query']['author'] ) );
} elseif ( is_string( $block->context['query']['author'] ) ) {
$query['author__in'] = array_filter( array_map( 'intval', explode( ',', $block->context['query']['author'] ) ) );
} elseif ( is_int( $block->context['query']['author'] ) && $block->context['query']['author'] > 0 ) {
$query['author'] = $block->context['query']['author'];
}
}
if ( ! empty( $block->context['query']['search'] ) ) {
$query['s'] = $block->context['query']['search'];
}
if ( ! empty( $block->context['query']['parents'] ) && is_post_type_hierarchical( $query['post_type'] ) ) {
$query['post_parent__in'] = array_filter( array_map( 'intval', $block->context['query']['parents'] ) );
}
}
/**
* Filters the arguments which will be passed to `WP_Query` for the Query Loop Block.
*
* Anything to this filter should be compatible with the `WP_Query` API to form
* the query context which will be passed down to the Query Loop Block's children.
* This can help, for example, to include additional settings or meta queries not
* directly supported by the core Query Loop Block, and extend its capabilities.
*
* Please note that this will only influence the query that will be rendered on the
* front-end. The editor preview is not affected by this filter. Also, worth noting
* that the editor preview uses the REST API, so, ideally, one should aim to provide
* attributes which are also compatible with the REST API, in order to be able to
* implement identical queries on both sides.
*
* @since 6.1.0
*
* @param array $query Array containing parameters for `WP_Query` as parsed by the block context.
* @param WP_Block $block Block instance.
* @param int $page Current query's page.
*/
return apply_filters( 'query_loop_block_query_vars', $query, $block, $page );
}
/**
* Helper function that returns the proper pagination arrow HTML for
* `QueryPaginationNext` and `QueryPaginationPrevious` blocks based
* on the provided `paginationArrow` from `QueryPagination` context.
*
* It's used in QueryPaginationNext and QueryPaginationPrevious blocks.
*
* @since 5.9.0
*
* @param WP_Block $block Block instance.
* @param bool $is_next Flag for handling `next/previous` blocks.
* @return string|null The pagination arrow HTML or null if there is none.
*/
function get_query_pagination_arrow( $block, $is_next ) {
$arrow_map = array(
'none' => '',
'arrow' => array(
'next' => '→',
'previous' => '←',
),
'chevron' => array(
'next' => '»',
'previous' => '«',
),
);
if ( ! empty( $block->context['paginationArrow'] ) && array_key_exists( $block->context['paginationArrow'], $arrow_map ) && ! empty( $arrow_map[ $block->context['paginationArrow'] ] ) ) {
$pagination_type = $is_next ? 'next' : 'previous';
$arrow_attribute = $block->context['paginationArrow'];
$arrow = $arrow_map[ $block->context['paginationArrow'] ][ $pagination_type ];
$arrow_classes = "wp-block-query-pagination-$pagination_type-arrow is-arrow-$arrow_attribute";
return "$arrow";
}
return null;
}
/**
* Helper function that constructs a comment query vars array from the passed
* block properties.
*
* It's used with the Comment Query Loop inner blocks.
*
* @since 6.0.0
*
* @param WP_Block $block Block instance.
* @return array Returns the comment query parameters to use with the
* WP_Comment_Query constructor.
*/
function build_comment_query_vars_from_block( $block ) {
$comment_args = array(
'orderby' => 'comment_date_gmt',
'order' => 'ASC',
'status' => 'approve',
'no_found_rows' => false,
);
if ( is_user_logged_in() ) {
$comment_args['include_unapproved'] = array( get_current_user_id() );
} else {
$unapproved_email = wp_get_unapproved_comment_author_email();
if ( $unapproved_email ) {
$comment_args['include_unapproved'] = array( $unapproved_email );
}
}
if ( ! empty( $block->context['postId'] ) ) {
$comment_args['post_id'] = (int) $block->context['postId'];
}
if ( get_option( 'thread_comments' ) ) {
$comment_args['hierarchical'] = 'threaded';
} else {
$comment_args['hierarchical'] = false;
}
if ( get_option( 'page_comments' ) === '1' || get_option( 'page_comments' ) === true ) {
$per_page = get_option( 'comments_per_page' );
$default_page = get_option( 'default_comments_page' );
if ( $per_page > 0 ) {
$comment_args['number'] = $per_page;
$page = (int) get_query_var( 'cpage' );
if ( $page ) {
$comment_args['paged'] = $page;
} elseif ( 'oldest' === $default_page ) {
$comment_args['paged'] = 1;
} elseif ( 'newest' === $default_page ) {
$max_num_pages = (int) ( new WP_Comment_Query( $comment_args ) )->max_num_pages;
if ( 0 !== $max_num_pages ) {
$comment_args['paged'] = $max_num_pages;
}
}
}
}
return $comment_args;
}
/**
* Helper function that returns the proper pagination arrow HTML for
* `CommentsPaginationNext` and `CommentsPaginationPrevious` blocks based on the
* provided `paginationArrow` from `CommentsPagination` context.
*
* It's used in CommentsPaginationNext and CommentsPaginationPrevious blocks.
*
* @since 6.0.0
*
* @param WP_Block $block Block instance.
* @param string $pagination_type Optional. Type of the arrow we will be rendering.
* Accepts 'next' or 'previous'. Default 'next'.
* @return string|null The pagination arrow HTML or null if there is none.
*/
function get_comments_pagination_arrow( $block, $pagination_type = 'next' ) {
$arrow_map = array(
'none' => '',
'arrow' => array(
'next' => '→',
'previous' => '←',
),
'chevron' => array(
'next' => '»',
'previous' => '«',
),
);
if ( ! empty( $block->context['comments/paginationArrow'] ) && ! empty( $arrow_map[ $block->context['comments/paginationArrow'] ][ $pagination_type ] ) ) {
$arrow_attribute = $block->context['comments/paginationArrow'];
$arrow = $arrow_map[ $block->context['comments/paginationArrow'] ][ $pagination_type ];
$arrow_classes = "wp-block-comments-pagination-$pagination_type-arrow is-arrow-$arrow_attribute";
return "$arrow";
}
return null;
}
/**
* Strips all HTML from the content of footnotes, and sanitizes the ID.
*
* This function expects slashed data on the footnotes content.
*
* @access private
* @since 6.3.2
*
* @param string $footnotes JSON-encoded string of an array containing the content and ID of each footnote.
* @return string Filtered content without any HTML on the footnote content and with the sanitized ID.
*/
function _wp_filter_post_meta_footnotes( $footnotes ) {
$footnotes_decoded = json_decode( $footnotes, true );
if ( ! is_array( $footnotes_decoded ) ) {
return '';
}
$footnotes_sanitized = array();
foreach ( $footnotes_decoded as $footnote ) {
if ( ! empty( $footnote['content'] ) && ! empty( $footnote['id'] ) ) {
$footnotes_sanitized[] = array(
'id' => sanitize_key( $footnote['id'] ),
'content' => wp_unslash( wp_filter_post_kses( wp_slash( $footnote['content'] ) ) ),
);
}
}
return wp_json_encode( $footnotes_sanitized );
}
/**
* Adds the filters for footnotes meta field.
*
* @access private
* @since 6.3.2
*/
function _wp_footnotes_kses_init_filters() {
add_filter( 'sanitize_post_meta_footnotes', '_wp_filter_post_meta_footnotes' );
}
/**
* Removes the filters for footnotes meta field.
*
* @access private
* @since 6.3.2
*/
function _wp_footnotes_remove_filters() {
remove_filter( 'sanitize_post_meta_footnotes', '_wp_filter_post_meta_footnotes' );
}
/**
* Registers the filter of footnotes meta field if the user does not have `unfiltered_html` capability.
*
* @access private
* @since 6.3.2
*/
function _wp_footnotes_kses_init() {
_wp_footnotes_remove_filters();
if ( ! current_user_can( 'unfiltered_html' ) ) {
_wp_footnotes_kses_init_filters();
}
}
/**
* Initializes the filters for footnotes meta field when imported data should be filtered.
*
* This filter is the last one being executed on {@see 'force_filtered_html_on_import'}.
* If the input of the filter is true, it means we are in an import situation and should
* enable kses, independently of the user capabilities. So in that case we call
* _wp_footnotes_kses_init_filters().
*
* @access private
* @since 6.3.2
*
* @param string $arg Input argument of the filter.
* @return string Input argument of the filter.
*/
function _wp_footnotes_force_filtered_html_on_import_filter( $arg ) {
// If `force_filtered_html_on_import` is true, we need to init the global styles kses filters.
if ( $arg ) {
_wp_footnotes_kses_init_filters();
}
return $arg;
}