Search products by category in Prestashop blocksearch module

If you want to search products by category using blocksearch module you need to override module and one Prestashop class.

How to do this

Create file /override/classes/Search.php with content:

<?php

class Search extends SearchCore {

    const SEARCH_IN_SUBCATEGORIES = true;

    public static function find($id_lang, $expr, $page_number = 1, $page_size = 1, $order_by = 'position', $order_way = 'desc', $ajax = false, $use_cookie = true, Context $context = null) {
        $id_category = intval(Tools::getValue('search_category'));
        $category_ids = false;

        if (!$context) {
            $context = Context::getContext();
        }

        if ($id_category > 0) {

            // get categories to search
            $key = 'search-getCategoryChildrenRecursive-' . $context->shop->id . '-' . $id_category;
            if (self::SEARCH_IN_SUBCATEGORIES && !Cache::isStored($key)) {
                $category_ids = self::getCategoryChildrenRecursive($id_category);
                Cache::store($key, $category_ids);
            } elseif (self::SEARCH_IN_SUBCATEGORIES && Cache::isStored($key)) {
                $category_ids = Cache::retrieve($key);
            } else {
                $category_ids = array($id_category);
            }
        }

        $db = Db::getInstance(_PS_USE_SQL_SLAVE_);

        // TODO : smart page management
        if ($page_number < 1) {
            $page_number = 1;
        }
        if ($page_size < 1) {
            $page_size = 1;
        }

        if (!Validate::isOrderBy($order_by) || !Validate::isOrderWay($order_way)) {
            return false;
        }

        $intersect_array = array();
        $score_array = array();
        $words = explode(' ', Search::sanitize($expr, $id_lang, false, $context->language->iso_code));

        foreach ($words as $key => $word) {
            if (!empty($word) && strlen($word) >= (int) Configuration::get('PS_SEARCH_MINWORDLEN')) {
                $word = str_replace(array('%', '_'), array('\\%', '\\_'), $word);
                $start_search = Configuration::get('PS_SEARCH_START') ? '%' : '';
                $end_search = Configuration::get('PS_SEARCH_END') ? '' : '%';

                $intersect_array[] = 'SELECT DISTINCT si.id_product
					FROM ' . _DB_PREFIX_ . 'search_word sw
					LEFT JOIN ' . _DB_PREFIX_ . 'search_index si ON sw.id_word = si.id_word
					WHERE sw.id_lang = ' . (int) $id_lang . '
						AND sw.id_shop = ' . $context->shop->id . '
						AND sw.word LIKE
					' . ($word[0] == '-' ? ' \'' . $start_search . pSQL(Tools::substr($word, 1, PS_SEARCH_MAX_WORD_LENGTH)) . $end_search . '\'' : ' \'' . $start_search . pSQL(Tools::substr($word, 0, PS_SEARCH_MAX_WORD_LENGTH)) . $end_search . '\''
                        );

                if ($word[0] != '-') {
                    $score_array[] = 'sw.word LIKE \'' . $start_search . pSQL(Tools::substr($word, 0, PS_SEARCH_MAX_WORD_LENGTH)) . $end_search . '\'';
                }
            } else {
                unset($words[$key]);
            }
        }

        if (!count($words)) {
            return ($ajax ? array() : array('total' => 0, 'result' => array()));
        }

        $score = '';
        if (is_array($score_array) && !empty($score_array)) {
            $score = ',(
				SELECT SUM(weight)
				FROM ' . _DB_PREFIX_ . 'search_word sw
				LEFT JOIN ' . _DB_PREFIX_ . 'search_index si ON sw.id_word = si.id_word
				WHERE sw.id_lang = ' . (int) $id_lang . '
					AND sw.id_shop = ' . $context->shop->id . '
					AND si.id_product = p.id_product
					AND (' . implode(' OR ', $score_array) . ')
			) position';
        }

        $sql_groups = '';
        if (Group::isFeatureActive()) {
            $groups = FrontController::getCurrentCustomerGroups();
            $sql_groups = 'AND cg.`id_group` ' . (count($groups) ? 'IN (' . implode(',', $groups) . ')' : '= 1');
        }

        $results = $db->executeS('
		SELECT DISTINCT cp.`id_product`
		FROM `' . _DB_PREFIX_ . 'category_product` cp
		' . (Group::isFeatureActive() ? 'INNER JOIN `' . _DB_PREFIX_ . 'category_group` cg ON cp.`id_category` = cg.`id_category`' : '') . '
		INNER JOIN `' . _DB_PREFIX_ . 'category` c ON cp.`id_category` = c.`id_category`
		INNER JOIN `' . _DB_PREFIX_ . 'product` p ON cp.`id_product` = p.`id_product`
		' . Shop::addSqlAssociation('product', 'p', false) . '
		WHERE c.`active` = 1
                ' . (($category_ids !== false) ? 'AND cp.`id_category` IN (' . implode(',', $category_ids) . ')' : '') . '
		AND product_shop.`active` = 1
		AND product_shop.`visibility` IN ("both", "search")
		AND product_shop.indexed = 1
		' . $sql_groups, true, false);

        $eligible_products = array();
        foreach ($results as $row) {
            $eligible_products[] = $row['id_product'];
        }

        $eligible_products2 = array();
        foreach ($intersect_array as $query) {
            foreach ($db->executeS($query, true, false) as $row) {
                $eligible_products2[] = $row['id_product'];
            }
        }
        $eligible_products = array_unique(array_intersect($eligible_products, array_unique($eligible_products2)));
        if (!count($eligible_products)) {
            return ($ajax ? array() : array('total' => 0, 'result' => array()));
        }

        $product_pool = '';
        foreach ($eligible_products as $id_product) {
            if ($id_product) {
                $product_pool .= (int) $id_product . ',';
            }
        }
        if (empty($product_pool)) {
            return ($ajax ? array() : array('total' => 0, 'result' => array()));
        }
        $product_pool = ((strpos($product_pool, ',') === false) ? (' = ' . (int) $product_pool . ' ') : (' IN (' . rtrim($product_pool, ',') . ') '));

        if ($ajax) {
            $sql = 'SELECT DISTINCT p.id_product, pl.name pname, cl.name cname,
						cl.link_rewrite crewrite, pl.link_rewrite prewrite ' . $score . '
					FROM ' . _DB_PREFIX_ . 'product p
					INNER JOIN `' . _DB_PREFIX_ . 'product_lang` pl ON (
						p.`id_product` = pl.`id_product`
						AND pl.`id_lang` = ' . (int) $id_lang . Shop::addSqlRestrictionOnLang('pl') . '
					)
					' . Shop::addSqlAssociation('product', 'p') . '
					INNER JOIN `' . _DB_PREFIX_ . 'category_lang` cl ON (
						product_shop.`id_category_default` = cl.`id_category`
						AND cl.`id_lang` = ' . (int) $id_lang . Shop::addSqlRestrictionOnLang('cl') . '
					)
					WHERE p.`id_product` ' . $product_pool . '
					ORDER BY position DESC LIMIT 10';
            return $db->executeS($sql, true, false);
        }

        if (strpos($order_by, '.') > 0) {
            $order_by = explode('.', $order_by);
            $order_by = pSQL($order_by[0]) . '.`' . pSQL($order_by[1]) . '`';
        }
        $alias = '';
        if ($order_by == 'price') {
            $alias = 'product_shop.';
        } elseif (in_array($order_by, array('date_upd', 'date_add'))) {
            $alias = 'p.';
        }
        $sql = 'SELECT p.*, product_shop.*, stock.out_of_stock, IFNULL(stock.quantity, 0) as quantity,
				pl.`description_short`, pl.`available_now`, pl.`available_later`, pl.`link_rewrite`, pl.`name`,
			 image_shop.`id_image` id_image, il.`legend`, m.`name` manufacturer_name ' . $score . ',
				DATEDIFF(
					p.`date_add`,
					DATE_SUB(
						"' . date('Y-m-d') . ' 00:00:00",
						INTERVAL ' . (Validate::isUnsignedInt(Configuration::get('PS_NB_DAYS_NEW_PRODUCT')) ? Configuration::get('PS_NB_DAYS_NEW_PRODUCT') : 20) . ' DAY
					)
				) > 0 new' . (Combination::isFeatureActive() ? ', product_attribute_shop.minimal_quantity AS product_attribute_minimal_quantity, IFNULL(product_attribute_shop.`id_product_attribute`,0) id_product_attribute' : '') . '
				FROM ' . _DB_PREFIX_ . 'product p
				' . Shop::addSqlAssociation('product', 'p') . '
				INNER JOIN `' . _DB_PREFIX_ . 'product_lang` pl ON (
					p.`id_product` = pl.`id_product`
					AND pl.`id_lang` = ' . (int) $id_lang . Shop::addSqlRestrictionOnLang('pl') . '
				)
				' . (Combination::isFeatureActive() ? 'LEFT JOIN `' . _DB_PREFIX_ . 'product_attribute_shop` product_attribute_shop
				ON (p.`id_product` = product_attribute_shop.`id_product` AND product_attribute_shop.`default_on` = 1 AND product_attribute_shop.id_shop=' . (int) $context->shop->id . ')' : '') . '
				' . Product::sqlStock('p', 0) . '
				LEFT JOIN `' . _DB_PREFIX_ . 'manufacturer` m ON m.`id_manufacturer` = p.`id_manufacturer`
				LEFT JOIN `' . _DB_PREFIX_ . 'image_shop` image_shop
					ON (image_shop.`id_product` = p.`id_product` AND image_shop.cover=1 AND image_shop.id_shop=' . (int) $context->shop->id . ')
				LEFT JOIN `' . _DB_PREFIX_ . 'image_lang` il ON (image_shop.`id_image` = il.`id_image` AND il.`id_lang` = ' . (int) $id_lang . ')
				WHERE p.`id_product` ' . $product_pool . '
				GROUP BY product_shop.id_product
				' . ($order_by ? 'ORDER BY  ' . $alias . $order_by : '') . ($order_way ? ' ' . $order_way : '') . '
				LIMIT ' . (int) (($page_number - 1) * $page_size) . ',' . (int) $page_size;
        $result = $db->executeS($sql, true, false);

        $sql = 'SELECT COUNT(*)
				FROM ' . _DB_PREFIX_ . 'product p
				' . Shop::addSqlAssociation('product', 'p') . '
				INNER JOIN `' . _DB_PREFIX_ . 'product_lang` pl ON (
					p.`id_product` = pl.`id_product`
					AND pl.`id_lang` = ' . (int) $id_lang . Shop::addSqlRestrictionOnLang('pl') . '
				)
				LEFT JOIN `' . _DB_PREFIX_ . 'manufacturer` m ON m.`id_manufacturer` = p.`id_manufacturer`
				WHERE p.`id_product` ' . $product_pool;
        $total = $db->getValue($sql, false);

        if (!$result) {
            $result_properties = false;
        } else {
            $result_properties = Product::getProductsProperties((int) $id_lang, $result);
        }

        return array('total' => $total, 'result' => $result_properties);
    }

    /**
     * Get category children recursive
     * 
     * @param int $id_category_
     * @param int $id_shop_
     * @param array $results
     * @return array
     */
    public static function getCategoryChildrenRecursive($id_category_, $id_shop_ = null, &$results = array()) {
        $id_category = intval($id_category_);

        if (!in_array($id_category, $results)) {
            array_push($results, $id_category);
        }

        if ($id_shop_ === null) {
            $id_shop_ = Context::getContext()->shop->id;
        }

        $id_shop = intval($id_shop_);

        $q = "SELECT c.`id_category`, COUNT(child.`id_category`) AS children "
                . "FROM `" . _DB_PREFIX_ . "category` c "
                . "JOIN `" . _DB_PREFIX_ . "category_shop` cs ON (c.`id_category` = cs.`id_category`) "
                . "LEFT JOIN `" . _DB_PREFIX_ . "category` child ON (c.`id_category` = child.`id_parent`) "
                . "WHERE c.`id_parent` = " . $id_category . " AND cs.`id_shop` = " . $id_shop;
        $data = Db::getInstance()->executeS($q);

        foreach ($data as $d) {
            if (!in_array($d['id_category'], $results)) {
                array_push($results, intval($d['id_category']));
            }

            if (intval($d['children']) > 0) {
                self::getCategoryChildrenRecursive($d['id_category'], $id_shop, $results);
            }
        }

        return $results;
    }

}

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<?php

class Search extends SearchCore {

const SEARCH_IN_SUBCATEGORIES = true;

public static function find($id_lang, $expr, $page_number = 1, $page_size = 1, $order_by = 'position', $order_way = 'desc', $ajax = false, $use_cookie = true, Context $context = null) {

$id_category = intval(Tools::getValue('search_category'));

$category_ids = false;

if (!$context) {

$context = Context::getContext();

}

if ($id_category > 0) {

// get categories to search

$key = 'search-getCategoryChildrenRecursive-' . $context->shop->id . '-' . $id_category;

if (self::SEARCH_IN_SUBCATEGORIES && !Cache::isStored($key)) {

$category_ids = self::getCategoryChildrenRecursive($id_category);

Cache::store($key, $category_ids);

} elseif (self::SEARCH_IN_SUBCATEGORIES && Cache::isStored($key)) {

$category_ids = Cache::retrieve($key);

} else {

$category_ids = array($id_category);

}

$db = Db::getInstance(_PS_USE_SQL_SLAVE_);

// TODO : smart page management

if ($page_number < 1) {

$page_number = 1;

}

if ($page_size < 1) {

$page_size = 1;

}

if (!Validate::isOrderBy($order_by) || !Validate::isOrderWay($order_way)) {

return false;

}

$intersect_array = array();

$score_array = array();

$words = explode(' ', Search::sanitize($expr, $id_lang, false, $context->language->iso_code));

foreach ($words as $key => $word) {

if (!empty($word) && strlen($word) >= (int) Configuration::get('PS_SEARCH_MINWORDLEN')) {

$word = str_replace(array('%', '_'), array('\\%', '\\_'), $word);

$start_search = Configuration::get('PS_SEARCH_START') ? '%' : '';

$end_search = Configuration::get('PS_SEARCH_END') ? '' : '%';

$intersect_array[] = 'SELECT DISTINCT si.id_product

FROM ' . _DB_PREFIX_ . 'search_word sw

LEFT JOIN ' . _DB_PREFIX_ . 'search_index si ON sw.id_word = si.id_word

WHERE sw.id_lang = ' . (int) $id_lang . '

AND sw.id_shop = ' . $context->shop->id . '

AND sw.word LIKE

' . ($word[0] == '-' ? ' \'' . $start_search . pSQL(Tools::substr($word, 1, PS_SEARCH_MAX_WORD_LENGTH)) . $end_search . '\'' : ' \'' . $start_search . pSQL(Tools::substr($word, 0, PS_SEARCH_MAX_WORD_LENGTH)) . $end_search . '\''

);

if ($word[0] != '-') {

$score_array[] = 'sw.word LIKE \'' . $start_search . pSQL(Tools::substr($word, 0, PS_SEARCH_MAX_WORD_LENGTH)) . $end_search . '\'';

}

} else {

unset($words[$key]);

}

if (!count($words)) {

return ($ajax ? array() : array('total' => 0, 'result' => array()));

}

$score = '';

if (is_array($score_array) && !empty($score_array)) {

$score = ',(

SELECT SUM(weight)

FROM ' . _DB_PREFIX_ . 'search_word sw

LEFT JOIN ' . _DB_PREFIX_ . 'search_index si ON sw.id_word = si.id_word

WHERE sw.id_lang = ' . (int) $id_lang . '

AND sw.id_shop = ' . $context->shop->id . '

AND si.id_product = p.id_product

AND (' . implode(' OR ', $score_array) . ')

) position';

}

$sql_groups = '';

if (Group::isFeatureActive()) {

$groups = FrontController::getCurrentCustomerGroups();

$sql_groups = 'AND cg.`id_group` ' . (count($groups) ? 'IN (' . implode(',', $groups) . ')' : '= 1');

}

$results = $db->executeS('

SELECT DISTINCT cp.`id_product`

FROM `' . _DB_PREFIX_ . 'category_product` cp

' . (Group::isFeatureActive() ? 'INNER JOIN `' . _DB_PREFIX_ . 'category_group` cg ON cp.`id_category` = cg.`id_category`' : '') . '

INNER JOIN `' . _DB_PREFIX_ . 'category` c ON cp.`id_category` = c.`id_category`

INNER JOIN `' . _DB_PREFIX_ . 'product` p ON cp.`id_product` = p.`id_product`

' . Shop::addSqlAssociation('product', 'p', false) . '

WHERE c.`active` = 1

' . (($category_ids !== false) ? 'AND cp.`id_category` IN (' . implode(',', $category_ids) . ')' : '') . '

AND product_shop.`active` = 1

AND product_shop.`visibility` IN ("both", "search")

AND product_shop.indexed = 1

' . $sql_groups, true, false);

$eligible_products = array();

foreach ($results as $row) {

$eligible_products[] = $row['id_product'];

}

$eligible_products2 = array();

foreach ($intersect_array as $query) {

foreach ($db->executeS($query, true, false) as $row) {

$eligible_products2[] = $row['id_product'];

}

$eligible_products = array_unique(array_intersect($eligible_products, array_unique($eligible_products2)));

if (!count($eligible_products)) {

return ($ajax ? array() : array('total' => 0, 'result' => array()));

}

$product_pool = '';

foreach ($eligible_products as $id_product) {

if ($id_product) {

$product_pool .= (int) $id_product . ',';

}

if (empty($product_pool)) {

return ($ajax ? array() : array('total' => 0, 'result' => array()));

}

$product_pool = ((strpos($product_pool, ',') === false) ? (' = ' . (int) $product_pool . ' ') : (' IN (' . rtrim($product_pool, ',') . ') '));

if ($ajax) {

$sql = 'SELECT DISTINCT p.id_product, pl.name pname, cl.name cname,

cl.link_rewrite crewrite, pl.link_rewrite prewrite ' . $score . '

FROM ' . _DB_PREFIX_ . 'product p

INNER JOIN `' . _DB_PREFIX_ . 'product_lang` pl ON (

p.`id_product` = pl.`id_product`

AND pl.`id_lang` = ' . (int) $id_lang . Shop::addSqlRestrictionOnLang('pl') . '

)

' . Shop::addSqlAssociation('product', 'p') . '

INNER JOIN `' . _DB_PREFIX_ . 'category_lang` cl ON (

product_shop.`id_category_default` = cl.`id_category`

AND cl.`id_lang` = ' . (int) $id_lang . Shop::addSqlRestrictionOnLang('cl') . '

)

WHERE p.`id_product` ' . $product_pool . '

ORDER BY position DESC LIMIT 10';

return $db->executeS($sql, true, false);

}

if (strpos($order_by, '.') > 0) {

$order_by = explode('.', $order_by);

$order_by = pSQL($order_by[0]) . '.`' . pSQL($order_by[1]) . '`';

}

$alias = '';

if ($order_by == 'price') {

$alias = 'product_shop.';

} elseif (in_array($order_by, array('date_upd', 'date_add'))) {

$alias = 'p.';

}

$sql = 'SELECT p.*, product_shop.*, stock.out_of_stock, IFNULL(stock.quantity, 0) as quantity,

pl.`description_short`, pl.`available_now`, pl.`available_later`, pl.`link_rewrite`, pl.`name`,

image_shop.`id_image` id_image, il.`legend`, m.`name` manufacturer_name ' . $score . ',

DATEDIFF(

p.`date_add`,

DATE_SUB(

"' . date('Y-m-d') . ' 00:00:00",

INTERVAL ' . (Validate::isUnsignedInt(Configuration::get('PS_NB_DAYS_NEW_PRODUCT')) ? Configuration::get('PS_NB_DAYS_NEW_PRODUCT') : 20) . ' DAY

)

) > 0 new' . (Combination::isFeatureActive() ? ', product_attribute_shop.minimal_quantity AS product_attribute_minimal_quantity, IFNULL(product_attribute_shop.`id_product_attribute`,0) id_product_attribute' : '') . '

FROM ' . _DB_PREFIX_ . 'product p

' . Shop::addSqlAssociation('product', 'p') . '

INNER JOIN `' . _DB_PREFIX_ . 'product_lang` pl ON (

p.`id_product` = pl.`id_product`

AND pl.`id_lang` = ' . (int) $id_lang . Shop::addSqlRestrictionOnLang('pl') . '

)

' . (Combination::isFeatureActive() ? 'LEFT JOIN `' . _DB_PREFIX_ . 'product_attribute_shop` product_attribute_shop

ON (p.`id_product` = product_attribute_shop.`id_product` AND product_attribute_shop.`default_on` = 1 AND product_attribute_shop.id_shop=' . (int) $context->shop->id . ')' : '') . '

' . Product::sqlStock('p', 0) . '

LEFT JOIN `' . _DB_PREFIX_ . 'manufacturer` m ON m.`id_manufacturer` = p.`id_manufacturer`

LEFT JOIN `' . _DB_PREFIX_ . 'image_shop` image_shop

ON (image_shop.`id_product` = p.`id_product` AND image_shop.cover=1 AND image_shop.id_shop=' . (int) $context->shop->id . ')

LEFT JOIN `' . _DB_PREFIX_ . 'image_lang` il ON (image_shop.`id_image` = il.`id_image` AND il.`id_lang` = ' . (int) $id_lang . ')

WHERE p.`id_product` ' . $product_pool . '

GROUP BY product_shop.id_product

' . ($order_by ? 'ORDER BY ' . $alias . $order_by : '') . ($order_way ? ' ' . $order_way : '') . '

LIMIT ' . (int) (($page_number - 1) * $page_size) . ',' . (int) $page_size;

$result = $db->executeS($sql, true, false);

$sql = 'SELECT COUNT(*)

FROM ' . _DB_PREFIX_ . 'product p

' . Shop::addSqlAssociation('product', 'p') . '

INNER JOIN `' . _DB_PREFIX_ . 'product_lang` pl ON (

p.`id_product` = pl.`id_product`

AND pl.`id_lang` = ' . (int) $id_lang . Shop::addSqlRestrictionOnLang('pl') . '

)

LEFT JOIN `' . _DB_PREFIX_ . 'manufacturer` m ON m.`id_manufacturer` = p.`id_manufacturer`

WHERE p.`id_product` ' . $product_pool;

$total = $db->getValue($sql, false);

if (!$result) {

$result_properties = false;

} else {

$result_properties = Product::getProductsProperties((int) $id_lang, $result);

}

return array('total' => $total, 'result' => $result_properties);

}

/**

* Get category children recursive

* @param int $id_category_

* @param int $id_shop_

* @param array $results

* @return array

public static function getCategoryChildrenRecursive($id_category_, $id_shop_ = null, &$results = array()) {

$id_category = intval($id_category_);

if (!in_array($id_category, $results)) {

array_push($results, $id_category);

}

if ($id_shop_ === null) {

$id_shop_ = Context::getContext()->shop->id;

}

$id_shop = intval($id_shop_);

$q = "SELECT c.`id_category`, COUNT(child.`id_category`) AS children "

. "FROM `" . _DB_PREFIX_ . "category` c "

. "JOIN `" . _DB_PREFIX_ . "category_shop` cs ON (c.`id_category` = cs.`id_category`) "

. "LEFT JOIN `" . _DB_PREFIX_ . "category` child ON (c.`id_category` = child.`id_parent`) "

. "WHERE c.`id_parent` = " . $id_category . " AND cs.`id_shop` = " . $id_shop;

$data = Db::getInstance()->executeS($q);

foreach ($data as $d) {

if (!in_array($d['id_category'], $results)) {

array_push($results, intval($d['id_category']));

}

if (intval($d['children']) > 0) {

self::getCategoryChildrenRecursive($d['id_category'], $id_shop, $results);

}

return $results;

}

Create file /override/module/blocksearch/blocksearch.php with content:

<?php

class BlockSearchOverride extends BlockSearch {

    public function hookTop($params) {
        $key = $this->getCacheId('blocksearch-top' . ((!isset($params['hook_mobile']) || !$params['hook_mobile']) ? '' : '-hook_mobile'));
        if (Tools::getValue('search_query') || !$this->isCached('blocksearch-top.tpl', $key)) {
            $this->calculHookCommon($params);
            $this->smarty->assign(array(
                'blocksearch_type' => 'top',
                'search_query' => (string) Tools::getValue('search_query')
            ));
        }
        Media::addJsDef(array('blocksearch_type' => 'top'));

        $categories_key = $this->getCacheId('blocksearch-top-categories-list');
        if (!$this->isCached('blocksearch-top.tpl', $categories_key)) {
            $categories_ = Category::getCategories(
                            Context::getContext()->language->id, true, 'c.`level_depth`', 'AND (c.`level_depth` = 2 OR c.`level_depth` = 3)'
            );
            $categories = array();

            foreach ($categories_ as $cats) {
                foreach ($cats as $cat) {
                    $categories[] = $cat['infos'];
                }
            }

            Cache::store($categories_key, $categories);
        } else {
            $categories = Cache::retrieve($categories_key);
        }

        $this->smarty->assign(array(
            'categories' => $categories
        ));

        return $this->display(__FILE__, 'blocksearch-top.tpl', Tools::getValue('search_query') ? null : $key);
    }

    public function calculHookCommon($params) {
        $this->smarty->assign(array(
            'ENT_QUOTES' => ENT_QUOTES,
            'search_ssl' => Tools::usingSecureMode(),
            'ajaxsearch' => Configuration::get('PS_SEARCH_AJAX'),
            'instantsearch' => Configuration::get('PS_INSTANT_SEARCH'),
            'self' => dirname(__FILE__),
        ));

        return true;
    }

}

<?php

class BlockSearchOverride extends BlockSearch {

public function hookTop($params) {

$key = $this->getCacheId('blocksearch-top' . ((!isset($params['hook_mobile']) || !$params['hook_mobile']) ? '' : '-hook_mobile'));

if (Tools::getValue('search_query') || !$this->isCached('blocksearch-top.tpl', $key)) {

$this->calculHookCommon($params);

$this->smarty->assign(array(

'blocksearch_type' => 'top',

'search_query' => (string) Tools::getValue('search_query')

));

}

Media::addJsDef(array('blocksearch_type' => 'top'));

$categories_key = $this->getCacheId('blocksearch-top-categories-list');

if (!$this->isCached('blocksearch-top.tpl', $categories_key)) {

$categories_ = Category::getCategories(

Context::getContext()->language->id, true, 'c.`level_depth`', 'AND (c.`level_depth` = 2 OR c.`level_depth` = 3)'

);

$categories = array();

foreach ($categories_ as $cats) {

foreach ($cats as $cat) {

$categories[] = $cat['infos'];

}

Cache::store($categories_key, $categories);

} else {

$categories = Cache::retrieve($categories_key);

}

$this->smarty->assign(array(

'categories' => $categories

));

return $this->display(__FILE__, 'blocksearch-top.tpl', Tools::getValue('search_query') ? null : $key);

}

public function calculHookCommon($params) {

$this->smarty->assign(array(

'ENT_QUOTES' => ENT_QUOTES,

'search_ssl' => Tools::usingSecureMode(),

'ajaxsearch' => Configuration::get('PS_SEARCH_AJAX'),

'instantsearch' => Configuration::get('PS_INSTANT_SEARCH'),

'self' => dirname(__FILE__),

));

return true;

}

Create/modify file /themes/yourThemeName/modules/blocksearch/block-search-top.tpl with content:

<!-- Block search module TOP -->
<div id="search_block_top" class="col-sm-4 clearfix">
    <form id="searchbox" method="get" action="{$link->getPageLink('search', null, null, null, false, null, true)|escape:'html':'UTF-8'}" >
        <input type="hidden" name="controller" value="search" />
        <input type="hidden" name="orderby" value="position" />
        <input type="hidden" name="orderway" value="desc" />
        <input class="search_query form-control" type="text" id="search_query_top" name="search_query" placeholder="{l s='Search' mod='blocksearch'}" value="{$search_query|escape:'htmlall':'UTF-8'|stripslashes}" />

        {* display categories list *}
        <select class="form-control" name="search_category">
            <option value="0">{l s='All Categories' mod='blocksearch'}</option>
            {foreach from=$categories item='c'}
                <option value="{$c.id_category}" {if isset($smarty.get.search_category) && $smarty.get.search_category == $c.id_category}selected{/if}>
                    {$c.name}
                </option>
            {/foreach}
        </select>
        {* / display categories list *}

        <button type="submit" name="submit_search" class="btn btn-default button-search">
            <span>{l s='Search' mod='blocksearch'}</span>
        </button>
    </form>
</div>
<!-- /Block search module TOP -->

<form id="searchbox" method="get" action="{$link->getPageLink('search', null, null, null, false, null, true)|escape:'html':'UTF-8'}" >

{* display categories list *}

<option value="0">{l s='All Categories' mod='blocksearch'}</option>

{foreach from=$categories item='c'}

{$c.name}

</option>

{/foreach}

</select>

{* / display categories list *}

<span>{l s='Search' mod='blocksearch'}</span>

</button>

</form>

</div>

Remove file /cache/class_index.php.
Done 🙂

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