Fix 10057: DomDocument load return type

[VincentLanglet]

I dunno if it closes phpstan/phpstan#10057

because of the php-8 issue, cf phpstan/phpstan#10057 (comment)

[phpstan-bot]

You've opened the pull request against the latest branch 1.11.x. If your code is relevant on 1.10.x and you want it to be released sooner, please rebase your pull request and change its target to 1.10.x.

[staabm]

I dunno if it closes phpstan/phpstan#10057

if you are not sure, you could add a NodeScopeResolverTest to verify your assumption

[VincentLanglet]

if you are not sure, you could add a NodeScopeResolverTest to verify your assumption

I'm pretty sure it won't close the PHP 8 part (and only fix the issue on php 7).

But I dunno how to fix it for PHP 8 since it's in phpstan/php-8-stubs and https://github.com/phpstan/php-8-stubs/blob/main/extractor/extract.php is not easy to understand at first read.

[ondrejmirtes]

Because the type in phpstan/php-8-stubs is only in a PHPDoc then changing functionMap.php here actually works, as can be seen in the Reflection golden test: https://github.com/phpstan/phpstan-src/actions/runs/8317200612/job/22757684538

[ondrejmirtes]

Thank you.