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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<?php
/**
* Post Data source for Block Bindings.
*
* @since 6.9.0
* @package WordPress
* @subpackage Block Bindings
*/
/**
* Gets value for Post Data source.
*
* @since 6.9.0
* @access private
*
* @param array $source_args Array containing arguments used to look up the source value.
* Example: array( "field" => "foo" ).
* @param WP_Block $block_instance The block instance.
* @return mixed The value computed for the source.
*/
function _block_bindings_post_data_get_value( array $source_args, $block_instance ) {
if ( empty( $source_args['field'] ) ) {
// Backward compatibility for when the source argument was called `key` in Gutenberg plugin.
if ( empty( $source_args['key'] ) ) {
return null;
}
$field = $source_args['key'];
} else {
$field = $source_args['field'];
}
/*
* BACKWARDS COMPATIBILITY: Hardcoded exception for navigation blocks.
* Required for WordPress 6.9+ navigation blocks. DO NOT REMOVE.
*/
$block_name = $block_instance->name ?? '';
$is_navigation_block = in_array(
$block_name,
array( 'core/navigation-link', 'core/navigation-submenu' ),
true
);
if ( $is_navigation_block ) {
// Navigation blocks: read from block attributes.
$post_id = $block_instance->attributes['id'] ?? null;
} else {
// All other blocks: use context.
$post_id = $block_instance->context['postId'] ?? null;
}
// If we don't have an entity ID, bail early.
if ( empty( $post_id ) ) {
return null;
}
// If a post isn't public, we need to prevent unauthorized users from accessing the post data.
$post = get_post( $post_id );
if ( ( ! is_post_publicly_viewable( $post ) && ! current_user_can( 'read_post', $post_id ) ) || post_password_required( $post ) ) {
return null;
}
if ( 'date' === $field ) {
return esc_attr( get_the_date( 'c', $post_id ) );
}
if ( 'modified' === $field ) {
// Only return the modified date if it is later than the publishing date.
if ( get_the_modified_date( 'U', $post_id ) > get_the_date( 'U', $post_id ) ) {
return esc_attr( get_the_modified_date( 'c', $post_id ) );
} else {
return '';
}
}
if ( 'link' === $field ) {
$permalink = get_permalink( $post_id );
return false === $permalink ? null : esc_url( $permalink );
}
}
/**
* Registers Post Data source in the block bindings registry.
*
* @since 6.9.0
* @access private
*/
function _register_block_bindings_post_data_source() {
register_block_bindings_source(
'core/post-data',
array(
'label' => _x( 'Post Data', 'block bindings source' ),
'get_value_callback' => '_block_bindings_post_data_get_value',
'uses_context' => array( 'postId', 'postType' ), // Both are needed on the client side.
)
);
}
add_action( 'init', '_register_block_bindings_post_data_source' );