# gutenberg/23.5.1/build/scripts/block-library/paragraph.php

Gutenberg, version 23.5.1. 49 lines.

- Page: https://pluginprobe.com/plugins/gutenberg/23.5.1/code/build/scripts/block-library/paragraph.php
- Raw: https://pluginprobe.com/plugins/gutenberg/23.5.1/raw/build/scripts/block-library/paragraph.php
- Modified: 2026-01-20T14:42:56+00:00

Line numbers below start at 1. Link to a line or a range by appending a fragment to the
page URL, for example `https://pluginprobe.com/plugins/gutenberg/23.5.1/code/build/scripts/block-library/paragraph.php#L10-L20`.

```php
<?php
/**
 * Server-side rendering of the `core/paragraph` block.
 *
 * @package WordPress
 */

/**
 * Append the `wp-block-paragraph` class before rendering the stored
 * `core/paragraph` block contents.
 *
 * For example, the following block content:
 *  <p class="align-left">Hello World</p>
 *
 * Would be transformed to:
 *  <p class="align-left wp-block-paragraph">Hello World</p>
 *
 * @since 7.0.0
 *
 * @param string $block_content The block content.
 *
 * @return string Filtered block content.
 */
function gutenberg_block_core_paragraph_add_class( $block_content ) {
	if ( ! $block_content ) {
		return $block_content;
	}

	$processor = new WP_HTML_Tag_Processor( $block_content );

	if ( $processor->next_tag( 'p' ) ) {
		$processor->add_class( 'wp-block-paragraph' );
	}

	return $processor->get_updated_html();
}

add_filter( 'render_block_core/paragraph', 'gutenberg_block_core_paragraph_add_class' );

/**
 * Registers the `core/paragraph` block on server.
 *
 * @since 7.0.0
 */
function gutenberg_register_block_core_paragraph() {
	register_block_type_from_metadata( __DIR__ . '/paragraph' );
}
add_action( 'init', 'gutenberg_register_block_core_paragraph', 20 );

```