eventespresso / event-espresso-core

            }

            $cleaned_value = $this->_construct_between_value($value, $field_obj);

            return $operator . SP . $cleaned_value;

        } elseif (in_array($operator, $this->_null_style_operators)) {

            if ($value !== null) {

                throw new EE_Error(

                    sprintf(

                        __(

                            "You attempted to give a value  (%s) while using a NULL-style operator (%s). That isn't valid",

                            "event_espresso"

                        ),

                        $value,

                        $operator

                    )

                );

            }

            return $operator;

        } elseif ($operator === 'LIKE' && ! is_array($value)) {

            //if the operator is 'LIKE', we want to allow percent signs (%) and not

            //remove other junk. So just treat it as a string.

            return $operator . SP . $this->_wpdb_prepare_using_field($value, '%s');

            return $operator . SP . $this->_wpdb_prepare_using_field($value, '%s');

        } elseif (! in_array($operator, $this->_in_style_operators) && ! is_array($value)) {

            return $operator . SP . $this->_wpdb_prepare_using_field($value, $field_obj);

        } elseif (in_array($operator, $this->_in_style_operators) && ! is_array($value)) {

            throw new EE_Error(

                sprintf(

                    __(

                        "Operator '%s' must be used with an array of values, eg 'Registration.REG_ID' => array('%s',array(1,2,3))",

                        'event_espresso'

                    ),

                    $operator,

                    $operator

                )

            );

        } elseif (! in_array($operator, $this->_in_style_operators) && is_array($value)) {

            throw new EE_Error(

                sprintf(

                    __(

            // get the file

            require_once($path);

            // if the class isn't already declared somewhere

            if (class_exists($class_name, false) === false) {

                // so sorry, not a class

                throw new EE_Error(

                    sprintf(

                        __('The %s file %s does not appear to contain the %s Class.', 'event_espresso'),

                        $type,

                        $path,

                        $class_name

                    )

                );

            }

        } catch (EE_Error $e) {

            $e->get_error();

            return false;