晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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User : rainic ( 1014)
PHP Version : 7.4.33
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Directory :  /home/rainic/www/wp-includesTZh/blocks/

Upload File :
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Current File : /home/rainic/www/wp-includesTZh/blocks/button.php
<?php
/**
 * Server-side rendering of the `core/button` block.
 *
 * @package WordPress
 */

/**
 * Renders the `core/button` block on the server,
 *
 * @since 6.6.0
 *
 * @param array  $attributes The block attributes.
 * @param string $content    The block content.
 *
 * @return string The block content.
 */
function render_block_core_button( $attributes, $content ) {
	$p = new WP_HTML_Tag_Processor( $content );

	/*
	 * The button block can render an `<a>` or `<button>` and also has a
	 * `<div>` wrapper. Find the a or button tag.
	 */
	$tag = null;
	while ( $p->next_tag() ) {
		$tag = $p->get_tag();
		if ( 'A' === $tag || 'BUTTON' === $tag ) {
			break;
		}
	}

	/*
	 * If this happens, the likelihood is there's no block content,
	 * or the block has been modified by a plugin.
	 */
	if ( null === $tag ) {
		return $content;
	}

	// If the next token is the closing tag, the button is empty.
	$is_empty = true;
	while ( $p->next_token() && $tag !== $p->get_token_name() && $is_empty ) {
		if ( '#comment' !== $p->get_token_type() ) {
			/**
			 * Anything else implies this is not empty.
			 * This might include any text content (including a space),
			 * inline images or other HTML.
			 */
			$is_empty = false;
		}
	}

	/*
	 * When there's no text, render nothing for the block.
	 * See https://github.com/WordPress/gutenberg/issues/17221 for the
	 * reasoning behind this.
	 */
	if ( $is_empty ) {
		return '';
	}

	return $content;
}

/**
 * Registers the `core/button` block on server.
 *
 * @since 6.6.0
 */
function register_block_core_button() {
	register_block_type_from_metadata(
		__DIR__ . '/button',
		array(
			'render_callback' => 'render_block_core_button',
		)
	);
}
add_action( 'init', 'register_block_core_button' );

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