From:
Operating system:
PHP version: 5.4.1
Package: Class/Object related
Bug Type: Bug
Bug description:cannot use self in interface function declaration
Description:
------------
I am reviewing existing code on a PHP5.4.1 testbed. I've discovered that
interface declarations using 'self' as a type hint no longer allow
implementations to use 'self' but require them to use the interface name.
It is no longer possible for an interface to declare a method that requires
the implementor's class as a typehint without declaring that class
specifically. And that would limit the usefulness of that interface to one
class only.
Test script:
---------------
interface IComparable {
public function equals(self $other);
}
class A implements IComparable{
protected $var;
public function __construct(self $v){
$this->var=$v;
}
public function equals($other){
return ($this->var == $other->var) ? 'equal' : 'different';
}
}
$a1= new A(7);
$a2= new A(5);
$a3= new A(5);
echo $a1->equals($a2),"\n";
echo $a2->equals($a3),"\n";
Expected result:
----------------
different
equal
Actual result:
--------------
PHP Fatal error: Declaration of A::equals() must be compatible with
IComparable::equals(IComparable $other)
--
Edit bug report at https://bugs.php.net/bug.php?id=61924&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=61924&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=61924&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=61924&r=trysnapshottrunk
Fixed in SVN:
https://bugs.php.net/fix.php?id=61924&r=fixed
Fixed in SVN and need be documented:
https://bugs.php.net/fix.php?id=61924&r=needdocs
Fixed in release:
https://bugs.php.net/fix.php?id=61924&r=alreadyfixed
Need backtrace:
https://bugs.php.net/fix.php?id=61924&r=needtrace
Need Reproduce Script:
https://bugs.php.net/fix.php?id=61924&r=needscript
Try newer version:
https://bugs.php.net/fix.php?id=61924&r=oldversion
Not developer issue:
https://bugs.php.net/fix.php?id=61924&r=support
Expected behavior:
https://bugs.php.net/fix.php?id=61924&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=61924&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=61924&r=submittedtwice
register_globals:
https://bugs.php.net/fix.php?id=61924&r=globals
PHP 4 support discontinued:
https://bugs.php.net/fix.php?id=61924&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=61924&r=dst
IIS Stability:
https://bugs.php.net/fix.php?id=61924&r=isapi
Install GNU Sed:
https://bugs.php.net/fix.php?id=61924&r=gnused
Floating point limitations:
https://bugs.php.net/fix.php?id=61924&r=float
No Zend Extensions:
https://bugs.php.net/fix.php?id=61924&r=nozend
MySQL Configuration Error:
https://bugs.php.net/fix.php?id=61924&r=mysqlcfg
