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Php openlog () function

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openlog -- Open connection to system logger


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 logging 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

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 opening the connection until the first message is logged
LOG_PERRORprint log message also to standard error
LOG_PIDinclude 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 console and include the PID in each message, you will use: LOG_CONS | LOG_NDELAY | LOG_PID

Table 2. openlog() Facilities

LOG_AUTH security/authorization messages (use LOG_AUTHPRIV instead in systems where that constant is defined)
LOG_AUTHPRIVsecurity/authorization messages (private)
LOG_CRONclock daemon (cron and at)
LOG_DAEMONother system daemons
LOG_KERNkernel messages
LOG_LOCAL0 ... LOG_LOCAL7reserved for local use, these are not available in Windows
LOG_LPRline printer subsystem
LOG_MAILmail subsystem
LOG_NEWSUSENET news subsystem
LOG_SYSLOGmessages generated internally by syslogd
LOG_USERgeneric user-level messages
LOG_UUCPUUCP subsystem

Note: LOG_USER is the only valid log type under Windows operating systems

See also define_syslog_variables(), syslog() and closelog().

Php openlog Function syntax tag

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Php openlog syntax tutorial

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