syslog
syslog
(PHP 4, PHP 5, PHP 7)
syslog — Generate a system log message
Description
bool syslog ( int $priority , string $message )
syslog() 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 facilities and option can be found in the man pages for syslog (3) on Unix machines.
Parameters
priority
priority is a combination of the facility and the level. Possible values are:
| 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 |
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()
<?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 ofLOG_LOCAL0throughLOG_LOCAL7for thefacilityparameter of openlog() is not available in Windows.
See Also
- openlog() - Open connection to system logger
- closelog() - Close connection to system logger
← socket_set_timeout
© 1997–2017 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
