Description
int
syslog ( int priority, string
message)
syslog() generates a log message
that will be distributed by the system logger. priority is a combination of the
facility and the level, values for which are given in the
next section. The remaining argument is 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.
表格 1. 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 |
範例 1. Using
syslog()
?php
define_syslog_variables();
// open syslog, include the process ID and also send
// the log to standard error, and use a user defined
// logging mechanism
openlog("myScripLog", 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 $REMOTE_ADDR ($HTTP_USER_AGENT)");
}
closelog();
?
|
|
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.
On Windows NT, the syslog service is emulated using the
Event Log.
注: Use of LOG_LOCAL0
through LOG_LOCAL7 for the facility parameter of
openlog() is not available in Windows.
See also
define_syslog_variables(), openlog()
and
closelog().