Fix PHP bugs and typos in performance scripts#1

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fglueck wants to merge 2 commits intomainfrom

fix-php-bugs-and-typos-9883028998476009004

Commits on Jan 30, 2026

Fix several bugs and typos in PHP performance scripts

google-labs-jules[bot]
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fglueck
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Fix bugs in PHP scripts and update README

google-labs-jules[bot]
and
fglueck
committed