WordPress/wp-includes/blocks/search.php

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<?php
/**
* Server-side rendering of the `core/search` block.
*
* @package WordPress
*/
/**
* Dynamically renders the `core/search` block.
*
* @param array $attributes The block attributes.
*
* @return string The search block markup.
*/
function render_block_core_search( $attributes ) {
static $instance_id = 0;
$input_id = 'wp-block-search__input-' . ++$instance_id;
$label_markup = '';
$button_markup = '';
if ( ! empty( $attributes['label'] ) ) {
$label_markup = sprintf(
'<label for="%s" class="wp-block-search__label">%s</label>',
$input_id,
$attributes['label']
);
}
$input_markup = sprintf(
'<input type="search" id="%s" class="wp-block-search__input" name="s" value="%s" placeholder="%s" />',
$input_id,
esc_attr( get_search_query() ),
esc_attr( $attributes['placeholder'] )
);
if ( ! empty( $attributes['buttonText'] ) ) {
$button_markup = sprintf(
'<button type="submit" class="wp-block-search__button">%s</button>',
$attributes['buttonText']
);
}
$class = 'wp-block-search';
if ( isset( $attributes['className'] ) ) {
$class .= ' ' . $attributes['className'];
}
if ( isset( $attributes['align'] ) ) {
$class .= ' align' . $attributes['align'];
}
return sprintf(
'<form class="%s" role="search" method="get" action="%s">%s</form>',
$class,
esc_url( home_url( '/' ) ),
$label_markup . $input_markup . $button_markup
);
}
/**
* Registers the `core/search` block on the server.
*/
function register_block_core_search() {
register_block_type(
'core/search',
array(
'attributes' => array(
'align' => array(
'type' => 'string',
'enum' => array( 'left', 'center', 'right', 'wide', 'full' ),
),
'className' => array(
'type' => 'string',
),
'label' => array(
'type' => 'string',
'default' => __( 'Search' ),
),
'placeholder' => array(
'type' => 'string',
'default' => '',
),
'buttonText' => array(
'type' => 'string',
'default' => __( 'Search' ),
),
),
'render_callback' => 'render_block_core_search',
)
);
}
add_action( 'init', 'register_block_core_search' );