(PHP 3 <= 3.0.18, PHP 4 >= 4.0.0)
openlog -- Open connection to system logger
Description
int openlog (string ident, int option, int facility)
openlog() opens a connection to the system logger for a program. The string
ident is added to each message. Values for option and
facility are given below. The option argument is used to indicate what
loggin options will be used when generating a log message. The facility argument is
used to specify what type of program is logging the message. This allows you to specify (in your
machine's syslog configuration) how messages coming from different facilities will be handled. The
use of openlog() is optional. It will automatically be called by syslog() if necessary, in which case ident will
default to FALSE.
Table 1. openlog() Options
| Constant |
Description |
| LOG_CONS |
if there is an error while sending data to the system
logger, write directly to the system console |
| LOG_NDELAY |
open the connection to the logger immediately |
| LOG_ODELAY |
(default) delay openning the connection until the first
message is logged |
| LOG_PERROR |
print log message also to standard error |
| LOG_PID |
include PID with each message |
You can use one or more of this options. When using multiple options you need to OR them,
i.e. to open the connection immediately, write to the consoloe and include the PID in each message,
you will use: LOG_CONS | LOG_NDELAY | LOG_PID
Table 2. openlog() Facilities
| Constant |
Description |
| LOG_AUTH |
security/authorization messages (use LOG_AUTHPRIV instead in
systems where that constant is defined) |
| LOG_AUTHPRIV |
security/authorization messages (private) |
| LOG_CRON |
clock daemon (cron and at) |
| LOG_DAEMON |
other system daemons |
| LOG_KERN |
kernel messages |
| LOG_LOCAL0 ... LOG_LOCAL7 |
reserved for local use |
| LOG_LPR |
line printer subsystem |
| LOG_MAIL |
mail subsystem |
| LOG_NEWS |
USENET news subsystem |
| LOG_SYSLOG |
messages generated internally by syslogd |
| LOG_USER |
generic user-level messages |
| LOG_UUCP |
UUCP subsystem |
See also
define_syslog_variables(), syslog() and closelog().
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