<?php
//Plugin Name: New Admin Bar Search

add_action( 'template_redirect', function() {
	remove_action( 'admin_bar_menu', 'wp_admin_bar_search_menu', 4 );
	add_action( 'admin_bar_menu', 'nabs_wp_admin_bar_search_menu', 4 );
} );
/**
 * Add search form.
 *
 * @since 3.3.0
 *
 * @param WP_Admin_Bar $wp_admin_bar
 */
function nabs_wp_admin_bar_search_menu( $wp_admin_bar ) {
	if ( is_admin() )
		return;

	$form  = '<form action="' . esc_url( home_url( '/' ) ) . '" method="get" id="adminbarsearch">';
	$form .= '<input class="adminbar-input" name="s" id="adminbar-search" type="text" value="" maxlength="150" />';
	$form .= '<input type="submit" class="adminbar-button" value="' . __('New Search') . '"/>';
	$form .= '</form>';

	$wp_admin_bar->add_menu( array(
		'parent' => 'top-secondary',
		'id'     => 'search',
		'title'  => $form,
		'meta'   => array(
			'class'    => 'admin-bar-search',
			'tabindex' => -1,
		)
	) );
}