$input_id        = 'wp-block-search__input-' . ++$instance_id;

	$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;

	$label_markup    = '';

	$input_markup    = '';

	$button_markup   = '';

	$inline_styles   = styles_for_block_core_search( $attributes );

	if ( $show_label ) {

		if ( ! empty( $attributes['label'] ) ) {

			$label_markup = sprintf(

				'<label for="%s" class="wp-block-search__label">%s</label>',

				$input_id,

				$attributes['label']

			);

		} else {

			$label_markup = sprintf(

				'<label for="%s" class="wp-block-search__label screen-reader-text">%s</label>',

				$input_id,

				__( 'Search' )

			);

		}

	}

	if ( $show_input ) {

		$input_markup = sprintf(

			'<input type="search" id="%s" class="wp-block-search__input" name="s" value="%s" placeholder="%s" %s required />',

			esc_attr( get_search_query() ),

			esc_attr( $attributes['placeholder'] ),

			$inline_styles['shared']

	if ( $show_button ) {

		$button_internal_markup = '';

		$button_classes         = '';

		if ( ! $use_icon_button ) {

			if ( ! empty( $attributes['buttonText'] ) ) {

				$button_internal_markup = $attributes['buttonText'];

			}

		} else {

			$button_classes        .= 'has-icon';

			$button_internal_markup =

				'<svg id="search-icon" 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>';

		}

			'<button type="submit" class="wp-block-search__button %s"%s>%s</button>',

			$button_classes,

			$inline_styles['shared'],

			$button_internal_markup

	$field_markup       = sprintf(

		'<div class="wp-block-search__inside-wrapper"%s>%s</div>',

		$inline_styles['wrapper'],

		$input_markup . $button_markup

	);

	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $classnames ) );

		'<form role="search" method="get" action="%s" %s>%s</form>',

		$wrapper_attributes,

		$label_markup . $field_markup

/**

 * Builds the correct top level classnames for the 'core/search' block.

 *

 * @param array $attributes The block attributes.

 *

 * @return string The classnames used in the block.

 */

function classnames_for_block_core_search( $attributes ) {

	$classnames = array();

	if ( ! empty( $attributes['buttonPosition'] ) ) {

		if ( 'button-inside' === $attributes['buttonPosition'] ) {

			$classnames[] = 'wp-block-search__button-inside';

		}

		if ( 'button-outside' === $attributes['buttonPosition'] ) {

			$classnames[] = 'wp-block-search__button-outside';

		}

		if ( 'no-button' === $attributes['buttonPosition'] ) {

			$classnames[] = 'wp-block-search__no-button';

		}

		if ( 'button-only' === $attributes['buttonPosition'] ) {

			$classnames[] = 'wp-block-search__button-only';

		}

	}

	if ( isset( $attributes['buttonUseIcon'] ) ) {

		if ( ! empty( $attributes['buttonPosition'] ) && 'no-button' !== $attributes['buttonPosition'] ) {

			if ( $attributes['buttonUseIcon'] ) {

				$classnames[] = 'wp-block-search__icon-button';

			} else {

				$classnames[] = 'wp-block-search__text-button';

			}

		}

	}

	return implode( ' ', $classnames );

}

/**

 * Builds an array of inline styles for the search block.

 *

 * The result will contain one entry for shared styles such as those for the

 * inner input or button and a second for the inner wrapper should the block

 * be positioning the button "inside".

 *

 * @param  array $attributes The block attributes.

 *

 * @return array Style HTML attribute.

 */

function styles_for_block_core_search( $attributes ) {

	$shared_styles  = array();

	$wrapper_styles = array();

	// Add width styles.

	$has_width   = ! empty( $attributes['width'] ) && ! empty( $attributes['widthUnit'] );

	$button_only = ! empty( $attributes['buttonPosition'] ) && 'button-only' === $attributes['buttonPosition'];

	if ( $has_width && ! $button_only ) {

		$wrapper_styles[] = sprintf(

			'width: %d%s;',

			esc_attr( $attributes['width'] ),

			esc_attr( $attributes['widthUnit'] )

		);

	}

	// Add border radius styles.

	$has_border_radius = ! empty( $attributes['style']['border']['radius'] );

	if ( $has_border_radius ) {

		// Shared style for button and input radius values.

		$border_radius   = $attributes['style']['border']['radius'];

		$shared_styles[] = sprintf( 'border-radius: %spx;', esc_attr( $border_radius ) );

		// Apply wrapper border radius if button placed inside.

		$button_inside = ! empty( $attributes['buttonPosition'] ) &&

			'button-inside' === $attributes['buttonPosition'];

		if ( $button_inside ) {

			// We adjust the border radius value for the outer wrapper element

			// to make it visually consistent with the radius applied to inner

			// elements.

			$default_padding  = 4;

			$adjusted_radius  = $border_radius + $default_padding;

			$wrapper_styles[] = sprintf( 'border-radius: %dpx;', esc_attr( $adjusted_radius ) );

		}

	}

	return array(

		'shared'  => ! empty( $shared_styles ) ? sprintf( ' style="%s"', implode( ' ', $shared_styles ) ) : '',

		'wrapper' => ! empty( $wrapper_styles ) ? sprintf( ' style="%s"', implode( ' ', $wrapper_styles ) ) : '',

	);

}