drupflare/drangler - v0.1.0
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    Variable FALLBACK_TARGET_PHPConst

    FALLBACK_TARGET_PHP: "8.5" = '8.5'

    The fallback, used when nothing could be read.

    Correct as of the worker's wrangler.jsonc aliasing ./runtime/php-binary.js to php-binary-85.ts. tests/target-runtime.spec.ts reads that alias out of the sibling checkout and fails when the two drift, so this constant is checked against the artifact rather than against itself.

    It is a fallback rather than a fact, and the normal case. The only route that reports the interpreter version is /php, which is diagnostic-gated -- so on a correctly configured deployment drangler CANNOT read it, and x-cfw-v does not help: that is the header CONTRACT version, bumped when a header is renamed, and it carries nothing about PHP.