PHP Manual

The DateTimeInterface interface

(PHP 5 >= 5.5.0, PHP 7)


DateTimeInterface is meant so that both DateTime and DateTimeImmutable can be type hinted for. It is not possible to implement this interface with userland classes.

Class synopsis

DateTimeInterface {
/* Methods */
public DateInterval diff ( DateTimeInterface $datetime2 [, bool $absolute = false ] )
public string format ( string $format )
public int getOffset ( void )
public int getTimestamp ( void )
public DateTimeZone getTimezone ( void )
public __wakeup ( void )


Version Description
5.5.8 Trying to implement DateTimeInterface raises a fatal error now. Formerly implementing the interface didn't raise an error, but the behavior was erroneous.

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