searchform.php

<form role="search" method="get" class="search-form" action="<?php echo esc_url( home_url( '/' ) ); ?>">
	<?php
		$rand = '_' . mt_rand( 10000, 99999 );
	?>
	<label for="search<?php echo $rand; ?>"><?php echo _x( 'Search for:', 'label', 'textdomain' ); ?></label>
	<input id="search<?php echo $rand; ?>" type="search" class="search-field" value="<?php echo get_search_query(); ?>" name="s" />
	<button type="submit" class="search-submit"><?php echo _x( 'Search', 'submit button', 'textdomain' ); ?></button>
</form>