DateTime::createFromFormat
DateTime::format
DateTime
PHP Manual

# DateTime::diff

(PHP 5 >= 5.3.0)

DateTime::diff — Returns the difference between two DateTime objects

### Описание

public DateInterval DateTime::diff ( DateTime `$datetime` [, bool `$absolute` ] )

Returns the difference between two DateTime objects.

### Список параметров

`datetime`

  The date to compare to.

`absolute`

  Whether to return absolute difference. Defaults to `FALSE`.

### Возвращаемые значения

The difference between two dates.

DateTime::createFromFormat
DateTime::format
DateTime
PHP Manual