Kohana 2.3.4 ORM and Regex database method

$prod_name = ORM::factory("product")->regex("prod_name", "^" . $searchArray[$i] . "$")->find_all();

$prod_name = ORM::factory("product")->regex("prod_name", "/b" . $searchArray[$i] . "/b")->find_all();

$prod_name = ORM::factory("product")->regex("prod_name", "/b" . $searchArray[$i] . "b/")->find_all();

$prod_name = ORM::factory("product")->like("prod_name",$searchArray[$i])->find_all();

$prod_name = ORM::factory("product")->like("prod_name",$searchArray[$i] . "%", FALSE)->find_all();

[[:<:]]shoe

shoe[[:>:]]

[[:<:]]shoe[[:>:]]

$prod_name = ORM::factory("product")->regex("prod_name", "[[:<:]]" . $searchArray[$i])->find_all();