Fixes for parsing PHPS Luke responses

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (7a7232f) 97.56% compared to head (fd119a2) 97.57%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1116 +/- ## ======================================= Coverage 97.56% 97.57% ======================================= Files 400 400 Lines 10441 10470 +29 ======================================= + Hits 10187 10216 +29 Misses 254 254 ``` | [Flag](https://app.codecov.io/gh/solariumphp/solarium/pull/1116/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=solariumphp) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/solariumphp/solarium/pull/1116/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=solariumphp) | `97.57% <100.00%> (+<0.01%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=solariumphp#carryforward-flags-in-the-pull-request-comment) to find out more.

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