WordPress/wp-includes/blocks.php

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<?php
/**
* Functions related to registering and parsing blocks.
*
* @package WordPress
* @subpackage Blocks
* @since 5.0.0
*/
/**
* Registers a block type.
*
* @since 5.0.0
*
* @param string|WP_Block_Type $name Block type name including namespace, or alternatively a
* complete WP_Block_Type instance. In case a WP_Block_Type
* is provided, the $args parameter will be ignored.
* @param array $args {
* Optional. Array of block type arguments. Any arguments may be defined, however the
* ones described below are supported by default. Default empty array.
*
* @type callable $render_callback Callback used to render blocks of this block type.
* }
* @return WP_Block_Type|false The registered block type on success, or false on failure.
*/
function register_block_type( $name, $args = array() ) {
return WP_Block_Type_Registry::get_instance()->register( $name, $args );
}
/**
* Unregisters a block type.
*
* @since 5.0.0
*
* @param string|WP_Block_Type $name Block type name including namespace, or alternatively a
* complete WP_Block_Type instance.
* @return WP_Block_Type|false The unregistered block type on success, or false on failure.
*/
function unregister_block_type( $name ) {
return WP_Block_Type_Registry::get_instance()->unregister( $name );
}
/**
* Determine whether a post or content string has blocks.
*
* This test optimizes for performance rather than strict accuracy, detecting
* the pattern of a block but not validating its structure. For strict accuracy,
* you should use the block parser on post content.
*
* @since 5.0.0
* @see parse_blocks()
*
* @param int|string|WP_Post|null $post Optional. Post content, post ID, or post object. Defaults to global $post.
* @return bool Whether the post has blocks.
*/
function has_blocks( $post = null ) {
if ( ! is_string( $post ) ) {
$wp_post = get_post( $post );
if ( $wp_post instanceof WP_Post ) {
$post = $wp_post->post_content;
}
}
return false !== strpos( (string) $post, '<!-- wp:' );
}
/**
* Determine whether a $post or a string contains a specific block type.
*
* This test optimizes for performance rather than strict accuracy, detecting
* the block type exists but not validating its structure. For strict accuracy,
* you should use the block parser on post content.
*
* @since 5.0.0
* @see parse_blocks()
*
* @param string $block_type Full Block type to look for.
* @param int|string|WP_Post|null $post Optional. Post content, post ID, or post object. Defaults to global $post.
* @return bool Whether the post content contains the specified block.
*/
function has_block( $block_type, $post = null ) {
if ( ! has_blocks( $post ) ) {
return false;
}
if ( ! is_string( $post ) ) {
$wp_post = get_post( $post );
if ( $wp_post instanceof WP_Post ) {
$post = $wp_post->post_content;
}
}
return false !== strpos( $post, '<!-- wp:' . $block_type . ' ' );
}
/**
* Returns an array of the names of all registered dynamic block types.
*
* @since 5.0.0
*
* @return array Array of dynamic block names.
*/
function get_dynamic_block_names() {
$dynamic_block_names = array();
$block_types = WP_Block_Type_Registry::get_instance()->get_all_registered();
foreach ( $block_types as $block_type ) {
if ( $block_type->is_dynamic() ) {
$dynamic_block_names[] = $block_type->name;
}
}
return $dynamic_block_names;
}