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run code in 200+ php & hhvm versions
Bugs & Features
<?php class C{ protected $date; public function __construct(){ $this->date=new DateTime(); } public function getCurrent(){ return clone $this->date; } } class A extends C{ public function getDate(){ return $this->getCurrent()->add(new DateInterval('P10D')); } public function getDateAgain(){ return $this->getCurrent()->add(new DateInterval('P10D')); } } class B extends C{ public function getDate(){ return $this->getCurrent()->add(new DateInterval('P20D')); } } $a=new A(); $b=new B(); echo $a->getDate()->format('Y-m-d') . "\n"; echo $b->getDate()->format('Y-m-d') . "\n"; echo $a->getDateAgain()->format('Y-m-d') . "\n";
based on MYNp6
Output for 5.6.0 - 5.6.30, hhvm-3.18.5 - 3.22.0, 7.0.0 - 7.3.0rc2
2017-11-25 2017-12-05 2017-11-25