[DomCrawler] Fixed incorrect value name conversion in getPhpValues() and getPhpFiles()
[DomCrawler] Add tests for recursive cases of getPhpValues() and getPhpFiles()
bug #10444 [DomCrawler] Fixed incorrect value name conversion in getPhpValues() and getPhpFiles() (romainneutron)

This PR was merged into the 2.3 branch.

Discussion
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[DomCrawler] Fixed incorrect value name conversion in getPhpValues() and getPhpFiles()

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #6908
| License       | MIT

This PR replaces #10193

Commits
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89c599e [DomCrawler] Add tests for recursive cases of getPhpValues() and getPhpFiles()
e961f57 [DomCrawler] Fixed incorrect value name conversion in getPhpValues() and getPhpFiles()