<?php
/**
* Server-side rendering of the `core/image` block.
*
* @package WordPress
*/
/**
* Renders the `core/image` block on the server,
* adding a data-id attribute to the element if core/gallery has added on pre-render.
*
* @param array $attributes The block attributes.
* @param string $content The block content.
* @return string Returns the block content with the data-id attribute added.
*/
function render_block_core_image( $attributes, $content ) {
if ( isset( $attributes['data-id'] ) ) {
// Add the data-id="$id" attribute to the img element
// to provide backwards compatibility for the Gallery Block,
// which now wraps Image Blocks within innerBlocks.
// The data-id attribute is added in a core/gallery `render_block_data` hook.
$data_id_attribute = 'data-id="' . esc_attr( $attributes['data-id'] ) . '"';
if ( ! str_contains( $content, $data_id_attribute ) ) {
$content = str_replace( '<img', '<img ' . $data_id_attribute . ' ', $content );
}
}
return $content;
}
/**
* Registers the `core/image` block on server.
*/
function register_block_core_image() {
register_block_type_from_metadata(
__DIR__ . '/image',
array(
'render_callback' => 'render_block_core_image',
)
);
}
add_action( 'init', 'register_block_core_image' );