PHP minimum version inconsistent: composer >=7.4 vs check_readiness() 7.1

[remyperona]

Summary

The minimum PHP version is declared inconsistently.

• composer.json: "php": ">=7.4"
• bootstrap-functions.php → check_readiness(): version_compare( phpversion(), '7.1.0', '<' )

Impact

Composer already refuses to install on PHP < 7.4, so the runtime 7.1.0 guard is both stale and unreachable. It misleads anyone reading the bootstrap into thinking 7.1–7.3 is supported.

Proposed fix

Align the guard to 7.4.0, or drop the runtime check entirely and rely on Composer's platform requirement (which is enforced at install time). CI currently runs 7.4 → 8.5, so 7.4 is the correct floor.

Good first issue.

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Found during an audit of WP Rocket's integration test suite, which depends on this package.

[fetachino]

Hi! I'd like to fix this by aligning the runtime guard with Composer's PHP 7.4 floor and updating/adding the readiness tests so the supported and unsupported boundaries are explicit. I’ll run the project’s full relevant test and style checks before opening the PR.