Automatic Instrumentation Lab: PHP Observer API

by severin
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PHP Observer API (PHP)

The PHP Observer API is a low-level instrumentation technique that hooks directly into the PHP engine’s execution flow. This approach uses C extensions to observe function calls at the Zend engine level, providing deep visibility into PHP application behavior without requiring code modifications. It operates at the language runtime level, similar to how other languages implement their instrumentation APIs.

Part of https://github.com/causely-oss/automatic-instrumentation-lab

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