syslog
Generate a system log message
Description
true syslog(int $priority, string $message)
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:
syslog 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 |
-
message
-
The message to send.
Return Values
Always returns true.
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, the syslog service is emulated using the Event
Log.
Note:
Use of LOG_LOCAL0 through
LOG_LOCAL7 for the facility
parameter of openlog is not available
in Windows.
See Also
- openlog
- closelog
- syslog.filter INI setting (starting with PHP 7.3)