Generate a system log message
Syntax
syslog(int $priority, string $message): bool
Parameters
priority
priority is a combination of the facility and the level.
| Constant (descending order) | 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 |
message
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.
Return
Returns TRUE on success or FALSE on failure.
Examples
<?
// open syslog, include the process ID and send the log to standard error, and use a user defined logging mechanism
$prefix = "myScriptLog";
$flags = LOG_PID | LOG_PERROR;
$facility = LOG_LOCAL0;
openlog($prefix, $flags, $facility);
if(authorized_client())
{
// do something
}
else
{
// unauthorized client, log attempt
$access = date("Y/m/d H:i:s");
$priority = LOG_WARNING;
$message = "unauthorized client: $access {$_SERVER['REMOTE_ADDR']} ({$_SERVER['HTTP_USER_AGENT']})";
syslog($priority, $message);
}
closelog();
?>
