[php-src] Issue #10001: Using named parameters with a variadic parameter

Issue: https://github.com/php/php-src/issues/10001 Author: kbond ### Description Consider the following code: ```php function foo(int $a = 0, int $b = 0, string ...$flags) {} ``` It is not possible to pass more than one value to $flags when using named parameters: ```php foo(flags: 'bar'); // valid foo(flags: 'bar', 'baz'); // Fatal error: Cannot use positional argument after named argument foo(flags: ['bar', 'baz']); // Fatal error: Uncaught TypeError: foo(): Argument #3 must be of type string, array given foo(flags: ...['bar', 'baz']); // Parse error: syntax error, unexpected token "..." ``` Additionally, foo(flags: 'bar'); results in the $flags being: ```php [ 'flags': 'bar', ] ``` Not sure if this is expected but I expected it to be ['bar']. ### PHP Version 8.0+ ### Operating System _No response_