From:
Operating system: All
PHP version: 5.3.8
Package: Unknown/Other Function
Bug Type: Feature/Change Request
Bug description:Allow subtype polymorphism in interfaces
Description:
------------
Please allow for subtype polymorphism/downcasting in interfaces.
Test script:
---------------
interface Deliverable {}
interface DeliverableWithTruck extends Deliverable {}
interface DeliveryService {
function deliver( Deliverable $deliverable, $destination );
}
class CookieJar implements DeliverableWithTruck {}
class ExpressDeliveryService implements DeliveryService {
function deliver( DeliverableWithTruck $deliverable, $destination ) {
echo "Delivery underway";
}
}
$fedEx = new ExpressDeliveryService;
$chocolateChipCookies = new CookieJar;
$fedEx->deliver( $chocolateChipCookies, "Sesame Street" );
Expected result:
----------------
Delivery underway
Actual result:
--------------
Fatal error: Declaration of ExpressDeliveryService::deliver() must be
compatible
with that of DeliveryService::deliver()
--
Edit bug report at https://bugs.php.net/bug.php?id=60107&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=60107&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=60107&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=60107&r=trysnapshottrunk
Fixed in SVN:
https://bugs.php.net/fix.php?id=60107&r=fixed
Fixed in SVN and need be documented:
https://bugs.php.net/fix.php?id=60107&r=needdocs
Fixed in release:
https://bugs.php.net/fix.php?id=60107&r=alreadyfixed
Need backtrace:
https://bugs.php.net/fix.php?id=60107&r=needtrace
Need Reproduce Script:
https://bugs.php.net/fix.php?id=60107&r=needscript
Try newer version:
https://bugs.php.net/fix.php?id=60107&r=oldversion
Not developer issue:
https://bugs.php.net/fix.php?id=60107&r=support
Expected behavior:
https://bugs.php.net/fix.php?id=60107&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=60107&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=60107&r=submittedtwice
register_globals:
https://bugs.php.net/fix.php?id=60107&r=globals
PHP 4 support discontinued:
https://bugs.php.net/fix.php?id=60107&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=60107&r=dst
IIS Stability:
https://bugs.php.net/fix.php?id=60107&r=isapi
Install GNU Sed:
https://bugs.php.net/fix.php?id=60107&r=gnused
Floating point limitations:
https://bugs.php.net/fix.php?id=60107&r=float
No Zend Extensions:
https://bugs.php.net/fix.php?id=60107&r=nozend
MySQL Configuration Error:
https://bugs.php.net/fix.php?id=60107&r=mysqlcfg
