Problem z wyszukiwarką w PDO

Witam,
Mam taki kod:

public function showListOfCompanies(int $sorting = 0, string $searchValue = "", int $actualPageNumber): array
    {
        $_sorting = $this->setSorting($sorting);
        $limit = $this->_config->record_limit_on_page;
        $offset = ($actualPageNumber - 1) * $this->_config->record_limit_on_page;

        $searchQuery = null;
        if ($searchValue !=""){
            $searchQuery .= " WHERE (notes  like :search or  street  like :search or city  like :search or post_code  like :search or phone_number  like :search) ";
        }

        $result = $this->_db->query("SELECT id_company, enable, name, nip, date_of_registration  FROM firmy $searchQuery  ORDER by $_sorting LIMIT $offset , $limit ;" , array("search" => "%$searchValue%"));
        return $result;
    }

    public function getNumberOfCompanies(string $searchValue = ""): int
    {
        return $this->_db->single("SELECT COUNT(id_company) AS id_company FROM psCompany ;");
    }

private function setSorting(int $sorting): string
    {
        if ($sorting == 2)
        {
            $sort = " name DESC  ";
        } elseif ($sorting == 3)
        {
            $sort = " id_company ASC  ";
        } elseif ($sorting == 4)
        {
            $sort = " id_company DESC  ";
        } else {
            $sort = " name ASC  ";
        }
        return $sort;
    }

Funkcja showListOfCompanies służy mi do wyświetlania i wyszukiwania danych.
Wszystko działa poprawnie do momentu gdy $searchValue jest puste (nikt, nic nie wpisał w wyszukiwarkę).
Jeśli $searchValue ma jakąś wartość, to mam pustą listę wyników.

Prawdopodobnie mam gdzieś błąd w WHERE.....

Ma ktoś może pomysł jak to naprawić?

Zamień to $searchQuery .= " WHERE (notes like :search or street like :search or city like :search or post_code like :search or phone_number like :search) ";
na to
$searchQuery .= ' WHERE (notes like ":search" or street like ":search" or city like ":search" or post_code like ":search" or phone_number like ":search") '