searchform.php
<?php
/**
* The template for displaying search forms
*
* @package WordPress
* @subpackage Strip
*/
?>
<form role="search" method="get" class="search-form" action="<?php echo esc_url( home_url( '/' ) ); ?>">
<label>
<span class="screen-reader-text"><?php echo esc_attr_x( 'Search for:', 'label', 'strip' ); ?></span>
<input type="search" class="search-field" placeholder="<?php echo esc_attr_x( 'Search?', 'placeholder', 'strip' ); ?>" value="<?php echo esc_attr( get_search_query() ); ?>" name="s" />
</label>
<input type="submit" class="search-submit" value="<?php echo esc_attr_x( 'Search', 'submit button', 'strip' ); ?>">
</form>