19.35 mod_unique_id

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	Webmaster in a Nutshell, 3rd Edition By Robert Eckstein, Stephen Spainhour
	Table of Contents
	Chapter 19.  Apache Modules

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The mod_unique_id module generates an environment variable, UNIQUE_ID, which is guaranteed to be a unique number for each request given to the server. The variable consists of an encoding of the 32-bit IP address of the server, the httpd process ID, the current UTC timestamp, and an independent counter.

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