PHP APM (C extension)

A minimal PHP 8 APM extension implemented in C using the Zend Observer API. It logs request metadata, errors, traces, and CPU time. The extension is designed for Linux and PHP 8.

Features

• Request metadata (method/URI)
• Error logging via zend_error_cb
• Function call tracing via Zend Observer API
• CPU time and wall time tracking
• Basic Zend and Opcache status markers

Build and install

phpize
./configure --enable-apm
make
sudo make install

Add to php.ini:

extension=apm
apm.enabled=1
apm.log_file=/var/log/php-apm.log

Notes

• Opcache status is noted as a placeholder in the log. For full details, call opcache_get_status() from userland and forward it to your APM backend.
• The extension logs to the configured file or falls back to php_error_docref when no file is set.