Send messages to the system logger.
The syslog functions are used to manage sending messages to the system logging facilities. On UNIX-like systems, they act as a wrapper for the underlying system logging functions and - with a few minor exceptions - can be expected to behave like their C language counterparts. The UNIX syslog facility is quite powerful and configurable. Log messages can be sent to files, consoles, or remote hosts, or cause a myriad of other events to occur. Detailing the functionality of UNIX system loggers is beyond the scope of this book. For more information, consult your system's man pages for entries on logger, syslog, syslogd, and syslog.conf.
When PHP is running under Windows, these functions send log messages to the event log. Not all Windows operating systems support the event log - consult your system's documentation for more details.
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PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at http://www.opencontent.org/openpub/). The authors of this book have elected not to choose any options under the OPL. This online book was obtained from http://www.fooassociates.com/phpfer/ and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.