1--TEST-- 2Bug #65768: date_diff accepts only DateTime instance even though docs say about DateTimeInterface 3--INI-- 4date.timezone=Europe/London 5--FILE-- 6<?php 7 8$dt1 = new DateTime("2010-10-20"); 9$dti1 = new DateTimeImmutable("2010-10-25"); 10$dti2 = new DateTimeImmutable("2010-10-28"); 11 12$diff1 = $dt1->diff($dti1); 13echo $diff1->y, " ", $diff1->m, " ", $diff1->d, " ", 14 $diff1->h, " ", $diff1->i, " ", $diff1->s, "\n"; 15 16$diff2 = $dti1->diff($dti2); 17echo $diff2->y, " ", $diff2->m, " ", $diff2->d, " ", 18 $diff2->h, " ", $diff2->i, " ", $diff2->s, "\n"; 19 20$diff3 = date_diff($dt1, $dti2); 21echo $diff3->y, " ", $diff3->m, " ", $diff3->d, " ", 22 $diff3->h, " ", $diff3->i, " ", $diff3->s, "\n"; 23 24class cdt1 extends DateTime implements DateTimeInterface {} 25 26class cdt2 extends DateTimeImmutable implements DateTimeInterface {} 27 28class cdt3 implements DateTimeInterface {} 29 30?> 31--EXPECTF-- 320 0 5 0 0 0 330 0 3 0 0 0 340 0 8 0 0 0 35 36Fatal error: DateTimeInterface can't be implemented by user classes in %sbug65768.php on line %d 37