[php-src] Issue #10197: implode() does not allow to skip optional separator with named arguments

Issue: https://github.com/php/php-src/issues/10197 Author: JayQ1982 ### Description The following code: ```php <?php echo implode(array: $array); ``` Resulted in this output: ``` **Fatal error:** Uncaught ArgumentCountError: implode(): Argument #1 ($separator) not passed ``` But I expected this output instead: Output of string where array of string is imploded with optional default separator (empty string) as described in the documentation: https://www.php.net/manual/en/function.implode https://www.php.net/manual/en/functions.arguments.php : > As of PHP 8.0.0, [named > arguments](https://www.php.net/manual/en/functions.arguments.php#functions.named-arguments) can be > used to skip over multiple optional parameters. https://www.php.net/manual/en/function.implode.php#refsect1-function.implode-description : > Alternative signature (not supported with named arguments): implode(array $array): string https://www.php.net/manual/en/function.implode.php#refsect1-function.implode-parameters : > separator > Optional. Defaults to an empty string. Why does implode() not accept to skip the optional separator with named parameters? Without named parameters it works. ### PHP Version PHP 8.2.0 ### Operating System Ubuntu 20.04