Prado\TPropertyValue::ensureArray PHP Метод

    public static function ensureArray($value)
    {
        if (is_string($value)) {
            $value = trim($value);
            $len = strlen($value);
            if ($len >= 2 && $value[0] == '(' && $value[$len - 1] == ')') {
                eval('$array=array' . $value . ';');
                return $array;
            } else {
                return $len > 0 ? array($value) : array();
            }
        } else {
            return (array) $value;
        }
    }

 /**
  * Validates if the parameter is a valid data source.
  * If it is a string or an array, it will be converted as a TList object.
  * @param Traversable|array|string data source to be validated
  * @return Traversable the data that is traversable
  * @throws TInvalidDataTypeException if the data is neither null nor Traversable
  */
 protected function validateDataSource($value)
 {
     if (is_string($value)) {
         $list = new TList();
         foreach (TPropertyValue::ensureArray($value) as $key => $value) {
             if (is_array($value)) {
                 $list->add($value);
             } else {
                 $list->add(array($value, is_string($key) ? $key : $value));
             }
         }
         return $list;
     } else {
         if (is_array($value)) {
             return new TMap($value);
         } else {
             if ($value instanceof TDbDataReader) {
                 // read array from TDbDataReader since it's forward-only stream and can only be traversed once
                 return $value->readAll();
             } else {
                 if ($value instanceof \Traversable || $value === null) {
                     return $value;
                 } else {
                     throw new TInvalidDataTypeException('databoundcontrol_datasource_invalid', get_class($this));
                 }
             }
         }
     }
 }