cache/Database.php
public function delete($key)
    {
        try {
            return (bool) $this->db->from($this->table)
                    ->where($this->columns['key'])->eq($this->prefix . $key)
                    ->delete();
        } catch (PDOException $e) {
            return false;
        }
    }
public function delete($key)
    {
        try {
            return (bool) $this->db->from($this->table)
                    ->where($this->columns['key'])->eq($this->prefix . $key)
                    ->delete();
        } catch (PDOException $e) {
            return false;
        }
    }
public function delete ( $ key ) { try { return ( bool ) $ this -> db -> from ( $ this -> table ) -> where ( $ this -> columns [ 'key' ] ) -> eq ( $ this -> prefix . $ key ) -> delete ( ) ; } catch ( PDOException $ e ) { return false ; } }
Delete a variable from the cache.

@param   string   $key  Cache key

@return  boolean
Delete a variable from the cache .