Source
File: wp-includes/blocks.php
function register_block_type_from_metadata( $file_or_folder, $args = array() ) {
$filename = 'block.json';
$metadata_file = ( substr( $file_or_folder, -strlen( $filename ) ) !== $filename ) ?
trailingslashit( $file_or_folder ) . $filename :
$file_or_folder;
if ( ! file_exists( $metadata_file ) ) {
return false;
}
$metadata = json_decode( file_get_contents( $metadata_file ), true );
if ( ! is_array( $metadata ) || empty( $metadata['name'] ) ) {
return false;
}
$metadata['file'] = $metadata_file;
$settings = array();
$property_mappings = array(
'title' => 'title',
'category' => 'category',
'parent' => 'parent',
'icon' => 'icon',
'description' => 'description',
'keywords' => 'keywords',
'attributes' => 'attributes',
'providesContext' => 'provides_context',
'usesContext' => 'uses_context',
'supports' => 'supports',
'styles' => 'styles',
'example' => 'example',
);
foreach ( $property_mappings as $key => $mapped_key ) {
if ( isset( $metadata[ $key ] ) ) {
$settings[ $mapped_key ] = $metadata[ $key ];
}
}
if ( ! empty( $metadata['editorScript'] ) ) {
$settings['editor_script'] = register_block_script_handle(
$metadata,
'editorScript'
);
}
if ( ! empty( $metadata['script'] ) ) {
$settings['script'] = register_block_script_handle(
$metadata,
'script'
);
}
if ( ! empty( $metadata['editorStyle'] ) ) {
$settings['editor_style'] = register_block_style_handle(
$metadata,
'editorStyle'
);
}
if ( ! empty( $metadata['style'] ) ) {
$settings['style'] = register_block_style_handle(
$metadata,
'style'
);
}
return register_block_type(
$metadata['name'],
array_merge(
$settings,
$args
)
);
}