The third article of a three part series, excerpted from chapter five of the book Advanced PHP Programming written by George Schlossnagle, talks about basic monitoring engine in PHP.

The first part of the series described how to reuse existing code libraries to perform administrative tasks in PHP and how to write standalone and one-liner scripts. It provided projects that put PHP to use outside the Web environment. The article shows you how to implement standalone scripts with PHP. It introduced the PHP Command-Line Interface (CLI). It also showed you how to handle Input/Output (I/O) and parse (CLI).

The second article showed you how to manage standalone scripts in PHP. It also walked you through the know how of closing shared resources. It explained signals and the method of writing daemons.
The latest article illustrates basic monitoring engine in PHP. It explains giving up privileges. It provides examples and explains monitoring services. The article concludes with sample 'ServiceLogger' process.

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