get_block_wrapper_attributes

WordPress Version: 5.9

/**
 * Generates a string of attributes by applying to the current block being
 * rendered all of the features that the block supports.
 *
 * @since 5.6.0
 *
 * @param string[] $extra_attributes Optional. Array of extra attributes to render on the block wrapper.
 * @return string String of HTML attributes.
 */
function get_block_wrapper_attributes($extra_attributes = array())
{
    $new_attributes = WP_Block_Supports::get_instance()->apply_block_supports();
    if (empty($new_attributes) && empty($extra_attributes)) {
        return '';
    }
    // This is hardcoded on purpose.
    // We only support a fixed list of attributes.
    $attributes_to_merge = array('style', 'class');
    $attributes = array();
    foreach ($attributes_to_merge as $attribute_name) {
        if (empty($new_attributes[$attribute_name]) && empty($extra_attributes[$attribute_name])) {
            continue;
        }
        if (empty($new_attributes[$attribute_name])) {
            $attributes[$attribute_name] = $extra_attributes[$attribute_name];
            continue;
        }
        if (empty($extra_attributes[$attribute_name])) {
            $attributes[$attribute_name] = $new_attributes[$attribute_name];
            continue;
        }
        $attributes[$attribute_name] = $extra_attributes[$attribute_name] . ' ' . $new_attributes[$attribute_name];
    }
    foreach ($extra_attributes as $attribute_name => $value) {
        if (!in_array($attribute_name, $attributes_to_merge, true)) {
            $attributes[$attribute_name] = $value;
        }
    }
    if (empty($attributes)) {
        return '';
    }
    $normalized_attributes = array();
    foreach ($attributes as $key => $value) {
        $normalized_attributes[] = $key . '="' . esc_attr($value) . '"';
    }
    return implode(' ', $normalized_attributes);
}