Feature Description
As discovered in a support topic, when Composer runs now on PHP 8 it will generate an autoload_real.php that causes syntax errors for PHP 5.6. According to the latest WordPress Statistics, PHP 5.6 only accounts for 6.6% of all installs, and any site running that version of WordPress gets a big upgrade warning shown on the Dashboard. PHP 5 versions older than 5.6 (which WordPress doesn't support now either) take up 2.9%. Given that PHP 5.6 is significantly slower than PHP 7 and PHP 8, it is not in the best interest of users to allow them to stay on this old version either in terms of PX.

Acceptance Criteria
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Implementation Brief
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QA Testing Instructions
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Demo
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Changelog Entry
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Feature Description
As discovered in a support topic, when Composer runs now on PHP 8 it will generate an
autoload_real.phpthat causes syntax errors for PHP 5.6. According to the latest WordPress Statistics, PHP 5.6 only accounts for 6.6% of all installs, and any site running that version of WordPress gets a big upgrade warning shown on the Dashboard. PHP 5 versions older than 5.6 (which WordPress doesn't support now either) take up 2.9%. Given that PHP 5.6 is significantly slower than PHP 7 and PHP 8, it is not in the best interest of users to allow them to stay on this old version either in terms of PX.README.md.amp.php, in both the metadata header and theifversion check statement.build-test-measure.ymltesting matrix.install-pwa-pluginmatrix property (since alwaystrue).external-httpfrom 5.6 to new lowest PHP version 7.0.build-zipGHA step (see Downgrade PHP version from 8.0 to 5.6 for development builds #7030).Remove any tests that targeted PHP<7.Add step to deploy command that lints the files invendorfor PHP 7.0 compatibility (e.g. via phpcs).Acceptance Criteria
No response
Implementation Brief
No response
QA Testing Instructions
No response
Demo
No response
Changelog Entry
No response