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If you are new to PHP or just need to refresh your skills, this is the place to start. This series of tutorials will give you the basic knowledge you will need to create a simple PHP website.
PHP is a reflective programming language originally designed for producing dynamic web pages.[1] PHP is used mainly in server-side scripting, but can be used from a command line interface or in standalone graphical applications. Textual User Interfaces can also be created using ncurses.
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
| 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 |
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, 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
See also define_syslog_variables(), syslog() and closelog().
Another Useful functions:
function.openlog |
PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML. If you are new to PHP and want to get some idea of how it works, try the introductory tutorial. After that, check out the online manual, and the example archive sites and some of the other resources available in the links section.