render_block_core_search

render_block_core_search: 这个函数用来渲染WordPress中的搜索栏块。搜索栏块允许用户在网站上搜索内容: 这个函数负责生成搜索栏的HTML标记，可以由用户自定义。

动态渲染`core/search`区块。

function render_block_core_search( $attributes ) {
	// Older versions of the Search block defaulted the label and buttonText
	// attributes to `__( 'Search' )` meaning that many posts contain `<!--
	// wp:search /-->`. Support these by defaulting an undefined label and
	// buttonText to `__( 'Search' )`.
	$attributes = wp_parse_args(
		$attributes,
		array(
			'label'      => __( 'Search' ),
			'buttonText' => __( 'Search' ),
		)
	);

	$input_id            = wp_unique_id( 'wp-block-search__input-' );
	$classnames          = classnames_for_block_core_search( $attributes );
	$show_label          = ( ! empty( $attributes['showLabel'] ) ) ? true : false;
	$use_icon_button     = ( ! empty( $attributes['buttonUseIcon'] ) ) ? true : false;
	$show_input          = ( ! empty( $attributes['buttonPosition'] ) && 'button-only' === $attributes['buttonPosition'] ) ? false : true;
	$show_button         = ( ! empty( $attributes['buttonPosition'] ) && 'no-button' === $attributes['buttonPosition'] ) ? false : true;
	$query_params        = ( ! empty( $attributes['query'] ) ) ? $attributes['query'] : array();
	$input_markup        = '';
	$button_markup       = '';
	$query_params_markup = '';
	$inline_styles       = styles_for_block_core_search( $attributes );
	$color_classes       = get_color_classes_for_block_core_search( $attributes );
	$typography_classes  = get_typography_classes_for_block_core_search( $attributes );
	$is_button_inside    = ! empty( $attributes['buttonPosition'] ) &&
		'button-inside' === $attributes['buttonPosition'];
	// Border color classes need to be applied to the elements that have a border color.
	$border_color_classes = get_border_color_classes_for_block_core_search( $attributes );

	$label_inner_html = empty( $attributes['label'] ) ? __( 'Search' ) : wp_kses_post( $attributes['label'] );

	$label_markup = sprintf(
		'<label for="%1$s" class="wp-block-search__label screen-reader-text">%2$s</label>',
		esc_attr( $input_id ),
		$label_inner_html
	);
	if ( $show_label && ! empty( $attributes['label'] ) ) {
		$label_classes = array( 'wp-block-search__label' );
		if ( ! empty( $typography_classes ) ) {
			$label_classes[] = $typography_classes;
		}
		$label_markup = sprintf(
			'<label for="%1$s" class="%2$s" %3$s>%4$s</label>',
			esc_attr( $input_id ),
			esc_attr( implode( ' ', $label_classes ) ),
			$inline_styles['label'],
			$label_inner_html
		);
	}

	if ( $show_input ) {
		$input_classes = array( 'wp-block-search__input' );
		if ( $is_button_inside ) {
			$input_classes[] = $border_color_classes;
		}
		if ( ! empty( $typography_classes ) ) {
			$input_classes[] = $typography_classes;
		}
		$input_markup = sprintf(
			'<input type="search" id="%s" class="wp-block-search__input %s" name="s" value="%s" placeholder="%s" %s required />',
			$input_id,
			esc_attr( implode( ' ', $input_classes ) ),
			get_search_query(),
			esc_attr( $attributes['placeholder'] ),
			$inline_styles['input']
		);
	}

	if ( count( $query_params ) > 0 ) {
		foreach ( $query_params as $param => $value ) {
			$query_params_markup .= sprintf(
				'<input type="hidden" name="%s" value="%s" />',
				esc_attr( $param ),
				esc_attr( $value )
			);
		}
	}

	if ( $show_button ) {
		$button_classes         = array( 'wp-block-search__button' );
		$button_internal_markup = '';
		if ( ! empty( $color_classes ) ) {
			$button_classes[] = $color_classes;
		}
		if ( ! empty( $typography_classes ) ) {
			$button_classes[] = $typography_classes;
		}
		$aria_label = '';

		if ( ! $is_button_inside && ! empty( $border_color_classes ) ) {
			$button_classes[] = $border_color_classes;
		}
		if ( ! $use_icon_button ) {
			if ( ! empty( $attributes['buttonText'] ) ) {
				$button_internal_markup = wp_kses_post( $attributes['buttonText'] );
			}
		} else {
			$aria_label       = sprintf( 'aria-label="%s"', esc_attr( wp_strip_all_tags( $attributes['buttonText'] ) ) );
			$button_classes[] = 'has-icon';

			$button_internal_markup =
				'<svg class="search-icon" viewBox="0 0 24 24" width="24" height="24">
					<path d="M13.5 6C10.5 6 8 8.5 8 11.5c0 1.1.3 2.1.9 3l-3.4 3 1 1.1 3.4-2.9c1 .9 2.2 1.4 3.6 1.4 3 0 5.5-2.5 5.5-5.5C19 8.5 16.5 6 13.5 6zm0 9.5c-2.2 0-4-1.8-4-4s1.8-4 4-4 4 1.8 4 4-1.8 4-4 4z"></path>
				</svg>';
		}

		// Include the button element class.
		$button_classes[] = wp_theme_get_element_class_name( 'button' );
		$button_markup    = sprintf(
			'<button type="submit" class="%s" %s %s>%s</button>',
			esc_attr( implode( ' ', $button_classes ) ),
			$inline_styles['button'],
			$aria_label,
			$button_internal_markup
		);
	}

	$field_markup_classes = $is_button_inside ? $border_color_classes : '';
	$field_markup         = sprintf(
		'<div class="wp-block-search__inside-wrapper %s" %s>%s</div>',
		esc_attr( $field_markup_classes ),
		$inline_styles['wrapper'],
		$input_markup . $query_params_markup . $button_markup
	);
	$wrapper_attributes   = get_block_wrapper_attributes(
		array( 'class' => $classnames )
	);

	return sprintf(
		'<form role="search" method="get" action="%s" %s>%s</form>',
		esc_url( home_url( '/' ) ),
		$wrapper_attributes,
		$label_markup . $field_markup
	);
}