Using named parameters with a variadic parameter

Description

Consider the following code:

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:

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 php/php-src#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:

[
    'flags': 'bar',
]

Not sure if this is expected but I expected it to be ['bar'].

PHP Version

8.0+

Operating System

No response

The issue names no documentation file or test; start by locating the PHP 8 documentation for named arguments and variadic parameters. Compare its documented behavior with the supplied foo() examples, and consider the work done when the supported syntax and resulting variadic array keys are explained accurately.