openlog

(PHP 4, PHP 5, PHP 7)

Open connection to system logger

bool openlog ( string $ident, int $option, int $facility )

openlog() opens a connection to the system logger for a program.

The use of openlog() is optional. It will automatically be called by syslog() if necessary, in which case ident will default to FALSE.

Parameters:

ident

The string ident is added to each message.

option

The option argument is used to indicate what logging options will be used when generating a log message.

**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 opening the connection until the first message is logged
`LOG_PERROR`	print log message also to standard error
`LOG_PID`	include PID with each message

OR LOG_CONS | LOG_NDELAY | LOG_PID

facility

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.

**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, these are not available in Windows
`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

Note:

LOG_USER is the only valid log type under Windows operating systems

Returns:

Returns TRUE on success or FALSE on failure.