WPML Multilingual Search slug

multilingual-search-slug-with-wpml.php

<?php
/*-----------------------------------------
	REWRITE SEARCH URLS
-----------------------------------------*/

// Redirect ?s=xxx to /search/xxx
function redirect_search_url()
{
	if (is_search() && !empty($_GET['s'])) {
		wp_redirect(home_url('/' . _x('search' /* default search slug */, 'search url slug', THEME_TEXT_DOMAIN) . '/') . urlencode(get_query_var('s')));
		exit();
	}
}

add_action('template_redirect', 'redirect_search_url');

// set the search base so the slug actually works
function rewrite_base_urls()
{
	global $wp_rewrite;
	// we cannot use _x('search', 'search url slug', THEME_TEXT_DOMAIN) here because we would need to re-build the rewrite rules every page-hit
	// and that is a big NOPE!
	$wp_rewrite->search_base = 'search';  /* must be same as default search slug */
}

add_action('init', 'rewrite_base_urls');

// but WordPress does not understand the translated slug, so we un-translate it.
function pre_patch_request_to_untranslate_search_slug($return)
{
	$lang = apply_filters('wpml_current_language');
	$current_url_prefix = trim(str_replace( site_url(), '', get_bloginfo('url') ), '/');
	if ($lang) {
		$untranslate = array(
			$current_url_prefix . '/' . _x('search' /* must be same as default search slug */, 'search url slug', THEME_TEXT_DOMAIN) => 
				$current_url_prefix . '/search',  /* must be same as default search slug */
		);
		// WordPress uses either one of these, so patch them both
		$_SERVER['PATH_INFO'] = strtr($_SERVER['PATH_INFO'], $untranslate);
		$_SERVER['REQUEST_URI'] = strtr($_SERVER['REQUEST_URI'], $untranslate);
	}
	return $return;
}

add_filter('do_parse_request', 'pre_patch_request_to_untranslate_search_slug', -100000);