source/Listing/Filters/ValueFilter.php
private function normalizeValue($value)
    {
        switch ($this->type) {
            case self::TYPE_STRING:
                return trim((string)$value);
            case self::TYPE_INT:
                return intval($value);
            case self::TYPE_FLOAT:
                return floatval($value);
        }

        throw new FilterException("Invalid filter value type \"{$this->type}\"");
    }
private function normalizeValue($value)
    {
        switch ($this->type) {
            case self::TYPE_STRING:
                return trim((string)$value);
            case self::TYPE_INT:
                return intval($value);
            case self::TYPE_FLOAT:
                return floatval($value);
        }

        throw new FilterException("Invalid filter value type \"{$this->type}\"");
    }
private function normalizeValue ( $ value ) { switch ( $ this -> type ) { case self :: TYPE_STRING : return trim ( ( string ) $ value ) ; case self :: TYPE_INT : return intval ( $ value ) ; case self :: TYPE_FLOAT : return floatval ( $ value ) ; } throw new FilterException ( "Invalid filter value type \"{$this->type}\"" ) ; }
Normalize input value

@param mixed $value
@return float|int|string
Normalize input value