php man page for syslog

SYSLOG(3)								 1								 SYSLOG(3)

syslog - Generate a system log message

SYNOPSIS
       bool syslog (int  $priority, string  $message)

DESCRIPTION
       syslog(3) generates a log message that will be distributed by the system logger.

	For  information on setting up a user defined log handler, see the syslog.conf(5) Unix manual page. More information on the syslog facili-
       ties and option can be found in the man pages for syslog(3) on Unix machines.

PARAMETERS
	      o $priority
		-$priority is a combination of the facility and the level. Possible values are:

	      syslog(3) Priorities (in descending order)

	      +------------+------------------------------------+
	      | Constant   |					|
	      | 	   |					|
	      | 	   |		Description		|
	      | 	   |					|
	      +------------+------------------------------------+
	      | 	   |					|
	      | LOG_EMERG  |					|
	      | 	   |					|
	      | 	   |	     system is unusable 	|
	      | 	   |					|
	      | 	   |					|
	      | LOG_ALERT  |					|
	      | 	   |					|
	      | 	   |  action must be taken immediately	|
	      | 	   |					|
	      | 	   |					|
	      | LOG_CRIT   |					|
	      | 	   |					|
	      | 	   |	    critical conditions 	|
	      | 	   |					|
	      | 	   |					|
	      |  LOG_ERR   |					|
	      | 	   |					|
	      | 	   |	      error conditions		|
	      | 	   |					|
	      | 	   |					|
	      |LOG_WARNING |					|
	      | 	   |					|
	      | 	   |	     warning conditions 	|
	      | 	   |					|
	      | 	   |					|
	      |LOG_NOTICE  |					|
	      | 	   |					|
	      | 	   | normal, but significant, condition |
	      | 	   |					|
	      | 	   |					|
	      | LOG_INFO   |					|
	      | 	   |					|
	      | 	   |	   informational message	|
	      | 	   |					|
	      | 	   |					|
	      | LOG_DEBUG  |					|
	      | 	   |					|
	      | 	   |	    debug-level message 	|
	      | 	   |					|
	      +------------+------------------------------------+
	      o $message
		- The message to send, except that the two characters %m will be replaced by the error message string (strerror) corresponding	to
		the present value of errno.

RETURN VALUES
	Returns TRUE on success or FALSE on failure.

EXAMPLES
       Example #1

	      Using syslog(3)

	      <?php
	      // open syslog, include the process ID and also send
	      // the log to standard error, and use a user defined
	      // logging mechanism
	      openlog("myScriptLog", LOG_PID | LOG_PERROR, LOG_LOCAL0);

	      // some code

	      if (authorized_client()) {
		  // do something
	      } else {
		  // unauthorized client!
		  // log the attempt
		  $access = date("Y/m/d H:i:s");
		  syslog(LOG_WARNING, "Unauthorized client: $access {$_SERVER['REMOTE_ADDR']} ({$_SERVER['HTTP_USER_AGENT']})");
	      }

	      closelog();
	      ?>

NOTES
	On Windows NT, the syslog service is emulated using the Event Log.

       Note

	       Use of LOG_LOCAL0 through LOG_LOCAL7 for the $facility parameter of openlog(3) is not available in Windows.

SEE ALSO
       openlog(3), closelog(3).

PHP Documentation Group 														 SYSLOG(3)