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   1  <?php
   2  /**
   3   * Server-side rendering of the `core/search` block.
   4   *
   5   * @package WordPress
   6   */
   7  
   8  /**
   9   * Dynamically renders the `core/search` block.
  10   *
  11   * @param array $attributes The block attributes.
  12   *
  13   * @return string The search block markup.
  14   */
  15  function render_block_core_search( $attributes ) {
  16      static $instance_id = 0;
  17  
  18      $input_id = 'wp-block-search__input-' . ++$instance_id;
  19  
  20      if ( ! empty( $attributes['label'] ) ) {
  21          $label_markup = sprintf(
  22              '<label for="%s" class="wp-block-search__label">%s</label>',
  23              $input_id,
  24              $attributes['label']
  25          );
  26      }
  27  
  28      $input_markup = sprintf(
  29          '<input type="search" id="%s" class="wp-block-search__input" name="s" value="%s" placeholder="%s" />',
  30          $input_id,
  31          esc_attr( get_search_query() ),
  32          esc_attr( $attributes['placeholder'] )
  33      );
  34  
  35      if ( ! empty( $attributes['buttonText'] ) ) {
  36          $button_markup = sprintf(
  37              '<button type="submit" class="wp-block-search__button">%s</button>',
  38              $attributes['buttonText']
  39          );
  40      }
  41  
  42      $class = 'wp-block-search';
  43      if ( isset( $attributes['className'] ) ) {
  44          $class .= ' ' . $attributes['className'];
  45      }
  46  
  47      return sprintf(
  48          '<form class="%s" role="search" method="get" action="%s">%s</form>',
  49          $class,
  50          esc_url( home_url( '/' ) ),
  51          $label_markup . $input_markup . $button_markup
  52      );
  53  }
  54  
  55  /**
  56   * Registers the `core/search` block on the server.
  57   */
  58  function register_block_core_search() {
  59      register_block_type(
  60          'core/search',
  61          array(
  62              'attributes'      => array(
  63                  'label'       => array(
  64                      'type'    => 'string',
  65                      'default' => __( 'Search' ),
  66                  ),
  67                  'placeholder' => array(
  68                      'type'    => 'string',
  69                      'default' => '',
  70                  ),
  71                  'buttonText'  => array(
  72                      'type'    => 'string',
  73                      'default' => __( 'Search' ),
  74                  ),
  75              ),
  76  
  77              'render_callback' => 'render_block_core_search',
  78          )
  79      );
  80  }
  81  
  82  add_action( 'init', 'register_block_core_search' );