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Bug #70839 Convertion optional argument to variadic forbidden by LSP checks
Submitted: 2015-11-02 16:48 UTC Modified: 2020-01-23 14:24 UTC
From: Assigned: nikic (profile)
Status: Closed Package: Scripting Engine problem
PHP Version: 5.6.16 OS:
Private report: No CVE-ID: None
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 [2015-11-02 16:48 UTC]
Should be allowed and was allowed in 5.6. Off by one error caused by the variadic parameter no longer counting as an argument.

Test script:
class Foo {
    public function test($bar = null) {}

class Baz extends Foo {
    public function test(...$args) {}


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 [2015-11-02 16:49 UTC]
-Status: Open +Status: Assigned -Assigned To: +Assigned To: nikic
 [2015-11-02 17:04 UTC]
-PHP Version: 7.0.0RC6 +PHP Version: 5.6.16
 [2015-11-02 17:04 UTC]
Actually this issue also exists in PHP 5.6 if you have more than one optional parameter:

class Foo {
    public function test($foo = null, $bar = null) {}

class Baz extends Foo {
    public function test(...$args) {}

The fact that it worked for one was just an accident that PHP 7 fixed.

We should allow changing any number of optional arguments to a variadic one in both 5.6 and 7.0.
 [2020-01-23 14:24 UTC]
-Status: Assigned +Status: Closed
 [2020-01-23 14:24 UTC]
Fixed by in PHP 8.0.
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